^{Click here to see her after the Time Skip}

Voiced by: Yoshino Takamori (Japanese), Wendee Lee (English, Streamline dub), Meg Bauman (English, ADV Films dub)

At the beginning of the series, Nadia is a circus performer exploited by her cruel ringmaster. She's an orphan whose sole identifying item is a blue stone, Blue Water, she wears in a necklace. Since the last months, she's tracked by criminals wanting her jewel, and once, while escaping them, during the 1889 World's Fair, she meets Jean, an inventor; both soon start to adventure and flee across the world, searching for Nadia's homeland...

Due to her difficult upbringing, Nadia has issues trusting others and in communication, and is very quick to anger; however, she's very attached to her friends. She's vegetarian and pacifist, which will cause her to clash with other characters due to her strong opinions on both subjects. As a result of her growing love for Jean, however, she gradually becomes a better person.

• Aloof Dark-Haired Girl: At the beginning of the series; she won't even give Jean the time of day. She changes her mind when he rescues her from Grandis.
• Ambiguously Brown: Invoked and discussed within the story itself. Nadia's brown skin, straight hair, teal eyes, and "stateless" anime heroine looks are all in marked contrast to the rest of the crew who all have recognizably ethnic features. Most characters only have a vague idea she might be African... or Indian... It turns out she's Atlantean.
• Badass Adorable: A cute 14-year-old girl, but you do not want to mess with her. She gets away from the Grandis gang on the Eiffel Tower by stomping on Sanson and Hanson's heads.
• Because You Were Nice to Me: Jean might be the first person that ever showed love and affection to Nadia in her whole life up to that point. Though she doesn't quite know how to handle it, she sticks with him because she does reciprocate his feelings for her (although she is the last one to admit it).
• Broken Bird: Due to her personal experiences with adults, particularly her circus ringmaster at the beginning of the series. This causes her to distrust adults and people in general, believing they either want to use her or simply want the Blue Water she possesses. Thankfully, she gets better with help from Jean, Grandis, and the Nautilus crew.
• Cannot Spit It Out: Nadia is unable to talk about her problems in an appropriate manner other than resorting to hateful rages and vicious insults. She's also unable to admit that she genuinely does love Jean.
• Charles Atlas Superpower: In the much-maligned Island arc, Nadia is shown lifting a rather hefty boulder well over her shoulders in order to crush open cans of food. This strength, alongside her athleticism and acrobatics, are not given major development in the story even to her advantage, as Nadia is staunchly against the use of violence.
• Circus Brat: Spent her formative year in a circus under a very cruel and greedy ringmaster, leading to some trust issues.
• Complaining About Rescues They Don't Like:
  • After Nemo shoots a Neo-Atlantean to save Nadia from being killed, Nadia shows no gratitude, but instead calls Nemo a murderer, ignoring all arguments that said soldier was aiming at her.
  • Later in the Island arc, she almost drowns while clinging to Nemo's cabin, and shows no gratitude to Jean and Marie for saving her life (she wanted to be rescued instead by her "real friends", the animals and the fish in the sea and doesn't like that they've caught fish). Marie, of all people, calls Nadia out on both her surly attitude and stubbornness, yelling, "What do you expect us to do?! Do you want us to starve to death instead of catching some fish?! I think those fish understand that more than you!" Nadia is obviously embarrassed and stunned by this response; up until now she has never seen Marie so angry at her.
• Contrived Coincidence: On the same day, Nadia realizes that she has the potential to destroy the world, then tries to kill herself... then finds out that it's her birthday.
• Cool Big Sis: Quickly becomes one to Marie, to the point where she is nicknamed as her "Mama".
  • Promoted to Parent: In a sense, her maternal instincts kick in when she and Jean find Marie still alive among her parents and dog's bodies.
• Cracks in the Icy Façade: Nadia was very abrasive towards Jean and mistrusting him due to the shell she had to built for herself during her abusive childhood in a circus. In the course of the series (barring parts of the Filler), she became more and more open to the others due to experimenting friendship, affection and love, even renouncing her Atlantean heritage if it means dropping them; even though, due to her Hair-Trigger Temper, she often disputes with Jean, she often apologises, by words or deeds, for harmful things she said to him. In the epilogue, she married Jean and presumaely kept contact with the rest of the protagonists.
• The Cynic: Nadia tends to suspect everyone she meets, especially if the subject is an adult.
• Damsel in Distress: Nadia is particularly susceptible to this, even when she is very fit as a trained acrobat. However, when it's revealed that she has the power to destroy the world, she begins doing this willingly just to save her friends.
• Defrosting Ice Queen: Nadia is gradually transformed from a cold, aloof, churlishly temperamental pessimist to a caring, trusting young woman as a result of her relationship with Jean.
• Driven to Suicide: Nadia reaches this point after learning the truth about herself and the Blue Water, on top of coming to the conclusion that she's a horrible person; which leads her to believe the world would be better off without her. The attempt is foiled, but not without repercussions.
• Going Native: Even though she's a full-blooded Atlantean, she's fully integred into human society to the point she choose to side with this society against Neo-Atlantis, even though she mostly experimented abuse and discrimination as a dark-skinned orphaned girl in the 1880s Europe.
• Hair-Trigger Temper: Nadia goes from calm to extremely angry with minimal provocation, which poses serious problems for her relationships. It takes her a long time to learn to control it.
• Hates Their Parent: Involuntary but despised Nemo for him killing and thus being at odds with her string pacifism.
• He Is Not My Boyfriend: Nadia obviously has feelings for Jean, but she impulsively declares otherwise to both Grandis and Marie when both call her out about it. (Naturally, since she has never known about love before, she does not know how to acknowledge it or express herself.)
• Heroic Self-Deprecation: Nadia has very low self-esteem and has a tendency of berating herself over it (which is not that far off, considering she used to be a slave). At one point, she even tries to kill herself.
• Immigrant Patriotism: Although Atlantean by birth, is utterly opposed to Neo Atlantis, even pointing to Gargoyle, who claimed humans were naturally frictuous, that Atlanteans managed to self-destroy through numerous wars while humans managed to thrive.
• Innocent Fanservice Girl: Played with. Nadia shows a lot of skin for a woman in the late 1800's Europe, though she is very conscientious of showing a little too much. The landmarks signaling her acceptance of her feelings towards Jean are marked by her gradual willingness to be seen naked by him (that is, if you don't count the filler in the Island and in Africa).
• It Sucks to Be the Chosen One: Nadia rises from being a slave girl to the potential destroyer of the world; small wonder she tries to kill herself.
• Jerkass: Nadia suffered through an awful childhood in a circus under an exploitative ringmaster but still comes across like this several times in the show when she takes her rage out on Jean and Nemo, saying rather undeservedly cruel things to both. (She gets even worse in both the Island and Africa arcs.)
  • In episode 20 she becomes extremely jealous of Jean's friendship with Electra, irrationally believing that the latter is going to take Jean away from her (when, in fact, nothing romantic is happening between Jean OR Electra). Her inability to express her concern with losing Jean nearly ruins her own relationship with him. (All that Jean is doing is just trying to learn more from Electra so that he can help mankind and Nadia herself; despite being stuck in the books at times, he is obviously very dedicated to helping her, to the point where you feel sorry for the boy every time Nadia takes out her anger on him.)
    • As a matter of fact Nadia even lays into Jean when he offers her manmade flowers (that Ensign Fait generously gives the boy) or attempts to compliment her in the abovementioned episode (as Electra advised him to). Naturally, this only succeeds in confusing poor Jean—to the point where he is surprised when she finally plucks up the courage to ask him directly for a compliment for a dress (awkwardly fashioned out of canvas) in episode 26. (Fourteen episodes earlier, she doesn't succeed in getting a compliment from Jean about a dress she's wearing since the latter is busy reading a book, but in that case she was sort of expecting him to read her mind and not knowing how else to act.)
    • In that same episode, Nadia furiously declares to Nemo that she hates him and the ''Nautilus'' crew; he slaps her for saying that, adding in a stern tone, "Please don't say sad things like that" ("You have made me very sad." in the dub).
  • On the flipside, she does apologize to Jean numerous times for her misdirected anger, even going out of her way to bring him something to eat, go on walks with him, or anything else conciliatory (in the canonical episodes), and even meet with Electra to discuss, but she never gets to do so to Nemo until the last episode, even though she realizes too late that she could have been nicer.
• Jungle Princess: As part of her circus uniform, wears a stereotypically version of this trope.
• Last of His Kind: After the deaths of Nemo and Neo, she's the last remaining full-blooded Atlantean on Earth.
• Lethal Chef:
  • As she wasn't trained to do so in her circus, is initially a bad cook on the Nautilus, as Grandis complains.
  • On the island, as a staunch vegetarian, she doesn't taste her fish stew to check whether there's too much spices, which made the rest of the group uneasy.
  • Averted in the epilogue, where she's depicted as a good cook.
• Limited Wardrobe: Nadia mostly wears her iconic circus outfit, apart in some occasion (a fan recount listed 9 other outfits - barring the times where she's nude - she's wearing).
• Lost Orphaned Royalty: She's discovered to be from the Atlantean royal family.
• Love Redeems: Nadia gradually abandons her stubborn views and sociopathic temper as she grows closer to Jean. (It helps that the latter loves her unconditionally and constantly forgives her for her mistakes.)
• Made a Slave: Nadia is sold at least twice in her life: the first time, she was sold to the circus by an unknown party to become a performer and was forced to work in order to eat; the second time, she was sold to Grandis by her ringmaster, using Counterfeit Cash.
• Meat Versus Veggies: This is the source of Nadia's Berserk Button, as explained above. She tries to impose her views on her friends while turning a deaf ear to Jean's reasoning that they only eat meat for food, not to do murder. Nadia eventually abandons this aggressive attitude, though, when she finally confesses her tragic past to Jean and Marie and the basis for her staunch vegetarianism. In the finale she's still not eating fish nor meat yet serves these to her husband and son.
• My God, What Have I Done?:
  • Nadia has this kind of look on her face in Episode 20 after she learns from Electra in the bath scene that Nautilus is merely fighting to destroy Gargoyle and that she is not in danger of losing Jean to Electra as Grandis had suggested. Earlier, she was stubbornly determined to believe Nemo and the Nautilus were both evil and was quite nasty to Jean (in a fit of jealousy) when he attempted to compliment her (as advised by Electra), along with the rest of the crew, including Marie. She looks quite remorseful for making such bad calls of judgment.
  • The same is true in Episode 23 when she reflects on how she had mistreated Nemo, including in the previous episode, where she instinctively rejected his goodbye. She was so disgusted by her behaviour she listed it in her pre-suicide attempt speech explaining why she was a horrible person.
• No Social Skills: Nadia. Having spent fourteen years of her life in a circus with a cruel, unloving ringmaster, she dislikes grownups with a vengeance. As such, she does not know how to interact with people.
• Not Quite the Right Thing: Nadia's way of angrily reacting impulsively is due in part to the way she was brought up by the circus ringmaster, who was verbally abusive at her; for most of her life, he was the only male influence she had available. Slowly, Nadia is able to shed his influence away. The other influence that the situation brought on her is the need to draw an audience for the show; she is particularly preachy and confrontational, and she makes a point to do it against a group of people. she even brings an "audience" when she tries to kill herself, much to her friends' scorn.
• Nubile Savage: Played with. She's depicted wearing normal (for 1880s Europe) clothes but wear a stereotypically "wild" dress as part of her circus outfits and keeps it while fleeing the Grandis gang until the end of the serie. In the epilogie, she's wearing European-style clothes.
• Pacifism Breaking Point: She starts the series as a staunch pacifist to the point of chewing Nemo for killing a Neo Atlantis soldier who was shooting at her. However, her meeting Gargoyle and Emperor Neo and her hearing their anti-human speeches made her say she wanted to kill Neo.
  Nadia: That's a very sad fate, since all I really wanna do is destroy you.
• Princess Protagonist: She's a circus acrobat who performs under the stage name of "Princess Nadia", unaware that her Orphan's Plot Trinket identifies her as a genuine princess from a lost civilization.
• Speaks Fluent Animal: Invoked and later confirmed. Nadia claims that she can talk to animals and offers King as proof of this. This is taken with a grain of salt until Nadia speaks with the whale Irion; she then is even able to understand penguins. In the Island arc, she's even able to read King's writing! Her vegetarianism springs from the fact she consider animals as persons, not as machines, and she finally admits others aren't evil for eating meat since, unlike her, they can't speak to these.
• Still Wearing The Old Colours: She kept wearing her old circus outfit (bat some exceptions) until the end of the serie.
• Tsundere: Type A.
• You Are Not Alone: Nadia has a tendency of forgetting she has friends and people that love her:
  • Nadia has been wearing the Blue Water for most of her life, oblivious to the fact that it contains her mother's soul and her entire civilization and race in it, and they're probably the reason why she made it out alive from the apocalypse at Tartessos in the first place and why she survived her suicide attempt.
  • Played with when Nadia tries to kill herself and she's admonished at the fact that she didn't consider her surrounding friends when she did it.
• You Are What You Hate: Nadia is a staunch pacifist and hates the prospect of watching anyone being killed; turns out that she's the ultimate warbringer and a living, walking weapon of mass destruction... little wonder she tries to kill herself once she finds out.
• You Can't Fight Fate: For good or ill, Nadia is destined to use the Blue Water to change the world and there's no escaping it; it contains the souls of every Atlantean who died in Tartessos, and only communicates with other Atlanteans - and she, along with her father Nemo and her brother Neo, are the only surviving Atlanteans. The Blue Water refuses to respond to Nemo's will as he is responsible for the destruction of Tartessos and Neo is dead in every way that matters, so it is up to her to determine the final fate of the souls within the Blue Water; to be resurrected to rule the Earth, or for their power to be expended in some world-shattering manner. This power cannot be contained forever, and eventually, she will have to make a choice. Though she goes to extremes to fight it. The Blue Water wouldn't let her. Ironically, once she gives in, the Blue Water permits her to destroy it - in order to resurrect Jean.

^{Click here to see him after the Time Skip}

Voiced by: Noriko Hidaka (Japanese), Ardwight Chamberlain (English, Streamline dub), Nathan Parsons (English, ADV Films dub)

Jean Rocque Raltique is a 14-year-old French inventor who came with his uncle to the 1889 World's Fair to participate to the flight competition. When he spots Nadia riding alongside the Seine, he aspires to get acquainted with her, but soon it turns into a rescue mission when he sees Grandis and her gang pursuing her. After saving Nadia, the two set off on a journey to find her origins.

Unlike Nadia, Jean is sweet-natured, trusting, and very optimistic. He also happens to be a brilliant inventor for someone his age, creating inventions such as a flying machine, an ice cream maker, etc. His primary motivation is to both help Nadia find her birthplace, and bring happiness to her, and is genuinely nice to everyone. He is also very patient and forgiving of Nadia's outbursts, consistently showing himself to be a true friend no matter what.

• Badass Adorable: He puts himself in dangerous situations time and time again just to rescue Nadia whenever she gets into trouble.
• Blind Without 'Em: Replete with the obligatory Dropped Glasses scene. To the point that without the glasses, his eyes are drawn much smaller than the usual "anime" size.
• Bungling Inventor: Of course, he's only 14 and lacks the experience that Hanson and the Nautilus engineers possess.
• Break the Cutie: Spent the series seeing science can also be used for great evils.
• Generation Xerox: From the look we get at his Father's photograph in the Movie, Jean appears to be the spitting image of his old man (minus a mustache).
• The Pollyanna: He has no issues trusting others and doesn't assume anybody has bad intentions. (The only exception is Gargoyle.)
• Steampunk Gadgeteers: Well, he's an inventor of the Belle Epoque.
• Teen Genius: At 14, he's already invented helicopters, jet planes and escalators, and has no problems working in a nuclear-powered submarine.

^{Click here to see her after the Time Skip}

Voiced by: Yuko Mizutani (Japanese), Cheryl Chase, (English, Streamline dub), Margaret Cassidy (English, ADV Films dub)

Marie is an orphaned girl Nadia and Jean met in Cape Verde, after her parents and dog got murdered by Neo Atlantis.

Always optimistic, she loves playing and enjoying life, and often is the sanest person of the show. She tries to enforce good table manners. She likes to play with King and has a great relationship with Sanson.
In episode 24, we discover she's born in Marseilles on April 10, 1885, but that her parents went soon after to work in the Cape Verde.
In The Finale, she marries Sanson.

• Age-Gap Romance: As noted above, in the finale, she marries Sanson, who is between 20 and 30 years older.
• Only Sane Man: Is often the most responsible of the characters; for example, in episode 24, she chews out Nadia for complaining the fish didn't save her because Jean and Marie were fishing. In the Nautilus, tried to enforce correct table manners.
• The Pollyanna: See the world as a wonderful place and don't get why there's dissensions. Her song "Doushite sonna no" is a good example of her fun-loving outlook.

^{Click here to see him after the Time Skip}

Voiced by: Kōichi Yamadera (Japanese, episode 3), Kouji Tsujitani (Japanese, episodes 15-39), Bob Bergen (English, Streamline dub), Jason Phelps (English, ADV Films dub)

Ayerton was first met on the USS Abraham Lincoln, in episode 3. He claimed to be a scientist with a special mission from Benjamin Harrison himself.

Later, Nadia and Jean meet him on the floating island, having been rejected by the Grandis gang for stealing food.

He loves to brag and make himself important.

• Badass Bookworm: For all his defaults, Ayerton seems to have really been a scientists who volunteered for a dangerous expedition.
• Blue Blood: Claims to belong to nobility. In the epilogie, he inherited an earldom.
• The Chief: Surprisingly, is a very good cook.
• Crying Wolf: He made so much lies his claims to be an English count were met with skepticism. In the ending, he inherited from a earldom. Lampshaded by Marie in the epilogue.
• Dirty Coward: In 36, wanted Nadia to surrender to Gargoyle, to save the rest of the team.
• The Load: On the floating island, was dismissed by the Grandis gang for stealing booze. After this, only bring his comments to the table, and sometimes bring them problems, like when he attempted to alert Garfish, thinking they were good guys.
• Shout-Out: A character similarly named was meet by the heroes of The Mysterious Island on their Lincoln Island.
• Upper-Class Twit: Loves to brag about how he's from high society. In the end, is revealed to have inherited an English earldom.

^{Click here to see him after the Time Skip}

Voiced by: Toshiharu Sakurai (Japanese), Carl Macek (English, Streamline dub), Shawn Sides (English, ADV Films dub)

King is the pet lion cub of Nadia.

Mostly cheerful, during the serie become friendly with Marie. Is jealous of Nadia starting to date Jean.

Tends to act very human.

In the finale, has two cubs and still lives with Nadia.

• Amplified Animal Aptitude: Even outside the Island arc, he acts very smart for a seemingly ordinary lion cub. For example, he manages to outsmart Marie during a school lecture made by Electra. In return, most of those surrounding him tend to treat him as a person, such as being held hostage by Gargoyle's troops or by Gonzales, or by plunging with Nemo, Jean, Hanson and Sanson to get precious healing marine herbs.
• Iconic Item: His red bandana. In the epilogue, his two cubs also wear it.
• Perpetual Frowner: Downplayed; while he freely shows other emotions, his default expression is a determined frown.
• Team Pet: For the Main Group.

The Blue Water is Nadia's jewel she wears as a necklace. Hugely covoted by several parties, she will learn the reasons why, and some of these will greatly displease her...

• All There in the Manual: In the Omake, we learn it's a holographic computer made from Orichalcum.
• Artifact of Doom: Badly used, it can destroy the Earth, which disgusts Nadia to the point of extreme measures.
• Clingy MacGuffin: Nadia couldn't rid off it by throwing it in the sea. Indeed, she couldn't kill herself because it protected her.
• I Have M Any Names: Blue Water, Philosopher's Stone, Toris Megistos, etc.
• MacGuffin Title: The Blue Water.
• Magitek: As a computer, it can command space vessels and hold the souls of an entire civilization.
• Orphan's Plot Trinket: The sole memento of her homeland, Nadia keeps it preciously.
• Philosopher's Stone: The Red Noah told Nadia it was one of the names for it.
• Soul Jar: Is the receptacle of the souls of every Atlantean.

In General

A team of professional thieves operating in Europe in the late 19th Century and the show's Starter Villains. The Gang initially pursues Nadia to obtain the Blue Water and collect its bounty. In doing so, however, they instead become caught up in the Secret War between Nemo and Gargoyle (and ultimately switch sides).

• Badass Crew: They may not have the size or resources of the Nautilus crew, but they're still badasses.
• Criminal Found Family: Grandis, Hanson and Sanson treat each other as a very loved relative. For exemple, in episode 10, Hanson and Sanson made Grandis sleep because they didn't want her to risk her life in a very dangerous task.
• The Fellowship Has Ended: By the time of the Distant Epilogue, the Gang has formally disbanded. Grandis and Sanson are still living in Europe while Hanson has relocated to the United States.
• Heel–Face Turn: One of the defining character arcs/developments of the series.
• Hidden Depths: Once aboard the Nautilus, Jean and Nadia (and by extension the audience) gradually get to know them better. We come to realize that they're not that evil at the end of the day, nor are they just two-dimensional cardboard cutouts either. Each of them have their own drives, wants, and personal pain and trauma.
• Large Ham: It's practically a job requirement.
• Laughably Evil: They're a trio of Large Hams driving around in a funny steampunk tank. And even after their reformation, they're still the primary comic relief of the show.
• Not-So-Harmless Villain: They may be Large Hams driving around in a funny steampunk tank...but do not for an instant think that means they aren't dangerous when they're on their game and not screwing around.
• Sad Clown: Once their backstories are gradually revealed, it becomes clear all three of them are carrying around their share of pain and loneliness.
• Starter Villain: The initial antagonists of Nadia for the opening episodes before Neo-Atlantis formally debuts.
• Starter Villain Stays: More or less. They stick around after the Cape Verde arc and while reforming, they still remain key players in the show's Myth Arc.
• Technologically Advanced Foe: Played straight in the opening episodes when they're still pursuing Jean and Nadia. Since Hanson is an engineering genius, the Gratan gives them the edge in their operational engines. However, they then meet their match going against the Abraham in Episode 03 and then Neo-Atlantis of course ultimately outclasses and eclipses them during the Cape Verde arc.
• Terrible Trio: Grandis and her crew are an Expy of the Time Bokan gang, with the twist that this time the fat guy is the genius engineer and the skinny guy is the strongman.
• True Companions: They're more than just a team of professional thieves and are, for all intents, a surrogate family who'd do anything for each other.

^{Click here to see her after the Time Skip}

Voiced by: Kumiko Takizawa (Japanese), Melanie MacQueen (English, Streamline dub), Sarah Richardson (English, ADV Films dub)

Grandis Granva is the leader of the gang.

Initially pursuing Nadia for her Blue Water, after being jailed by Neo Atlantis, she soon joined her side and assumed a somewhat maternal role over her.

Redheaded, she loves jewelry since the ruination of her parents by a Gold Digger.

• Action Girl: After her High-Heel–Face Turn, turn into the heroic version.
• Dark Action Girl: She's after all the leader of a gang of robbers who's pursuing a 14-year-old for her heirlooms.
• A Father to His Men: Is very protective of Sanson and Hanson.
• Fiery Redhead: She led a gang of robbers, she's very passionate in love and can be quick to anger.
• Impoverished Patrician: Originally from an Italian noble family, her father and she lost everything after she married a Gold Digger. She only managed to save her mother's jewel box.
• Heartbroken Badass: Even 12 years after Nemo's death, is still single because she's missing him.
• High-Heel–Face Turn: After discovering her gang was unknowingly working for Neo Atlantis when they tracked the Blue Water, they switched their allegiances to Nemo and then Nadia.
• Love Redeems: Initially, after their rescue from Gargoyle, the Grandis gang just wanted to heal themselves, fix the Gratan and then leave. However, after Grandis felt in love with Nemo, she instead decided to join the Nautilus crew.
• Parental Substitute: After her Heel–Face Turn, serve of maternal figure to Nadia, teaching her small things such as cooking and romance which weren't taught in her circus.
• Supreme Chef: Although her dishes aren't looking good, they have very good taste. Grandis is a skilled cook who's transmitting her skills to Nadia and who suceeded, as proven in the epilogue.

^{Click here to see him after the Time Skip}

Voiced by: Kenyū Horiuchi (Japanese), Tom Wyner (English, Streamline dub), Martin Blacker (English, ADV Films dub)

Sanson was the driver of Grandis before her family was ruined. Along with Hanson, he decided to stay for her.

Very good shooter and accomplished playboy, he think physical force matters more than intelligence.

In the epilogue, is married with Marie.

• Age-Gap Romance: As noted above, in the finale he marries Marie, who is between 20 and 30 years younger.
• The Casanova: View himself as the pinnacle of the Latin lover.
• Dark and Troubled Past: Grew up in a war-torn country.
• Drives Like Crazy: He seems to enjoy driving the Gang's steampunk tank a little too much. When the series opens, he's been a manic driver long enough that Grandis and Hanson aren't even fazed by it anymore.
• Fedora of Asskicking: While and Hanson both sport a nice hat, Sanson arguably qualifies for this particular Trope more than Hanson due to his status as the team's strongman.
• Heterosexual Life-Partners: With Hanson (though he does become close to Jean as well).
• Large Ham: The entire Grandis Gang is comprised of Large Hams, but Sanson is arguably the Ham Among Hams, as it were.
• Old Retainer: Technically young retainer, but close enough and still played straight. He and Hanson are the last of Grandis' former manservants who stayed loyal to her even after her financial ruin.
• Sharp-Dressed Man: Loves to dress to the nine, as part of him being a Casanova, to the point he had an entire collection of nearly identical suits.
• Wife Husbandry: Married with Marie in the finale, years after playing with her.

^{Click here to see him after the Time Skip}

Voiced by: Toshiharu Sakurai (Japanese), Steve Kramer (English, Streamline dub), Corey Gagne (English, ADV Films dub)

Hanson is the Chief Engineer of the Gang and the creator of the Gratan. Small and fat, thinks brains are better than brawn.

In the epilogue, owns a car-making company and plans to create a family.

• Gadgeteer Genius: Created the Gratan, is fascinated with the Nautilus and very friendly with fellow engineer Jean.
• Heterosexual Life-Partners: Primarily with Sanson, but he and Jean also end up becoming very close friends thanks to their shared engineering interests.
• Large Ham: Perhaps not to the same degree as Grandis or Sanson, but he's no slouch either when the occasion calls for it.
• Nerds Are Virgins: Is very timid with women. When offering flowers to Electra to seduce her, she replied she will give them to Nemo, as he love flowers. In the epilogue, is single yet seek a wife.
• Old Retainer: Much like Sanson, he was the only other manservant to stay with Grandis even after she ended up bankrupt.
• Rags to Riches: Ends up founding a very profitable automotive company after the end of the series.

^{Click here to see its refit}

Designed and built from scratch by Hanson, the Gratan is a small multi-purpose vehicle: it has wheels for ground movement, but may also fly using a hot-air balloon and propellers, and even travel underwater. Its configuration can be switched by the pilot using a piano keyboard in the cockpit. The Gratan, whose original meaning is "Grandis' tank", is the common name for the vehicle, while Grandis prefers to call it the Catherine.

After being damaged and repaired countless times during the series, the Gratan is eventually crushed by the igniter of Red Noah's Light of Babel, a sacrifice necessary to avoid destruction of a defenseless N-Nautilus.

• Companion Cube: For Hanson primarily, but the entire Gang is very fond of their little vehicle.
• Cute Machines: The Gratan might be the cutest, badass tank in fiction.
• Dented Iron: The Gratan racks up major damage at the end of the Nautilus arc and isn't functioning at 100% for the Island and Africa arcs. It's eventually patched up by the time of the Closing Arc.
• Due to the Dead: Hanson bids his baby farewell before activating the self-destruct charges.
• Heroic Sacrifice: The Tank is destroyed in the penultimate episode to destroy the Red Noah's Wave-Motion Gun.
• Insistent Terminology: Calling it the Catherine or the Gratan is a longtime internal debate among the Gang.
• Mid-Season Upgrade: The Gratan is refitted with Atlantean technology from the N-Nautilus in the lead-up to the final battle. These upgrades prove crucial to the Gratan's infiltration of Red Noah.
• Steampunk: One of the cornerstones of the show's Steampunk aesthetic.
• Tank Goodness: She's especially a bona-fide marvel of engineering even when compared to the Nautilus and the industry displayed by Neo Atlantis.
• Transforming Mecha: She can fly! She can drive! She can swim...kinda.

^{Click here to see them in their N-Nautilus uniform}

The crew of the Nautilus has been gathered around the world, recruited among victims of the Neo Atlantis wanting to avenge their losses, whether shipwrecked sailors or surviving Tartessos denizens.

• Badass Crew: They're our first, last, and only line of defense against the Neo-Atlanteans. That takes a special kind of moxie.
• Critical Staffing Shortage: So much the applications of the Grandis gang, Jean and Nadia are accepted by the rest of the crew.
• Mildly Military: Nemo insists he isn't a military leader.
• Multinational Team: As the Neo Atlantis crimes span the entire Earth, it's only natural those wanting to fight them are also recruited among numerous nations. Nemo even make the point that it proves several nations could ally together.
• Submarine Pirates: Technically, although they're ironically, for all intents, hunting submarine pirates (i.e. Neo-Atlantean Garfish).
• You Can't Go Home Again: Some of them are from Tartessos, meaning they no longer have a home.

^{Click here to see him aboard the N-Nautilus}

^{Click here to see him in Old Tartessos}

Voiced by: Akio Ōtsuka (Japanese) Jeff Winkless (English, Streamline dub), Ev Lunning, Jr. (English, ADV Films dub)

Nemo is the captain of the Nautilus.

Stern yet fair, he led his crew to fight Neo Atlantis wherever it's needed. However, he hide much mysteries and secrets.

In the finale, is revealed to be named Eleusis La Arwall.

• The Atoner: Haunted by the deaths of Tartessos, he renounced his identity and stated he lived only to destroy Neo Atlantis. Sacrificed himself to destroy the Red Noah.
• Badass Longcoat: Acquires one after switching his flag over to the N-Nautilus.
• Expy: Nemo is a dead ringer for Captain Gloval of the SDF Macross.
• The Good Captain: Led his crew against an evil organization which victimized them, always hear their suggestions.
• Heroic Sacrifice: Stayed aboard the Red Noah to ensure it's permanently destroyed. Previously, he told Electra he lived only long enough to fight Gargoyle.
• I Did What I Had to Do: His motto, ever since he blew out Tartessos to prevent Gargoyle from getting the Tower of Babel. During the story, will face numerous Cold Equations, ranging from letting three sailors die from Deadly Gas to ordering Jean to shot a brainwashed Nadia.
• Manly Facial Hair: Has the most badass mustache not only aboard the Nautilus, but all the seven seas.
• Not So Stoic: When confronted with Grandis' cooking for the first time.
• Parental Substitute: Consider Electra his foster daughter since the disappearance of his infant daughter Nadia. So much he refused to self-destruct the Nautilus to preserve Electra.
• Reasonable Authority Figure: Refuses to self-destruct the Nautilus, even when it could have destroyed Gargoyle too, limits himself to ground Jean for his failed experiment and slaps Nadia only when she went very far (as in, angrily stating she hated the entire crew) when she attempted to speak for Jean about said incident, and engages in Cold Equation only when strictly necessary.
• The Stoic: And for good reason given his backstory and tragedy.

^{Click here to see her aboard the N-Nautilus}

^{Click here to see her in Old Tartessos}

Voiced by: Kikuko Inoue (Japanese), Edie Mirman (English, Streamline dub), Jennifer Stuart (English, ADV Films dub)

Electra is the first mate of Nemo, to whom she's utterly devoted. She also resents him for destroying Tartessos, thereby destroying her entire family.

Having lost her entire family to Gargoyle's actions, she want to avenge them by any necessary means, even if it means harming herself or other relations.

In the finale, we learn her real name is Medina.

• Action Girl: Well, she's part from the crew of a military-ish submarine.
• Crusading Widower: Wants to avenge her family.
• Meaningful Name: Electra is the name of a Greek princess who pledged to avenge her father's murder.
• The Mutiny: In episode 22, she attempts a one-woman mutiny against Nemo over his refusal to self-destruct the Nautilus to take down Gargoyle, complaining Nemo grew too soft because of daughter Nadia returning.
• Number Two: She's Nemo's First Offoi
• The Unfettered: Has no limits to her will to destroy Neo Atlantis: in 14, she was the sole to oppose Nemo's plan to seek drugs needed to treat Nadia and Marie, who otherwise would have both died from a tropical fever. In 22, she attempts to kill Nemo because he refused her plan to self-destruct the Nautilus to bring Gargoyle with them.
• The Rival: Both her and Grandis viee over Nemo's heart. First Girl Wins.
• Someone to Remember Him By: In the series finale, she's revealed to have conceived a child with Nemo before the Main Group reunited with the Nautilus crew at Old Tartessos.
• Wartime Wedding: She's implied to have had one with Nemo during the interim between the Nautilus Arc and the Closing Arc. In Nadia's Omake Theater, it is explicitly stated.

Voiced by: Yasunori Matsumoto (Japanese), Kerrigan Mahan (English, Streamline dub), Greg Gondek (English, ADV Films dub)

Eiko is Nautilus' sonar operator.

Previously serving under Jean's father, he now serves under Nemo after his boat was attacked by Neo Atlantis.

• Florence Nightingale Effect: Founder of the Ikolina fan club, he marries her at the end.
• Sole Survivor: All other sailors of the Elise Le Havre, including Jean's father, have died.

Voiced by: Toshihiko Seki (Japanese), Maurice Moore (English, ADV Films dub)

Ensign Fait briefly befriends Jean, both sharing the same enthusiasm for science.

His awful and brutal agony and death serve to show how brutal is the Secret War against Neo Atlantis truly is.

• Cruel and Unusual Death: Died, along with two other sailors, from radioactive Deadly Gas. The rest of the crew had to hear them agonising.
• Ensign Newbie: He sure will not have the occasion to rank up.
• Face Death with Despair: After praising Nemo and his mission, his last declaration was about how he wished to have lived a full life.
• Red Shirt: Only appears in one single episode, the one he died.

Voiced by: Billy F. Haden (English, ADV Films dub)

The Chief Engineer is Exactly What It Says on the Tin. He seems to have known Nemo in Tartessos.

• Everyone Calls Him "Barkeep": No name or even pseudonym is known other than his title job.
• Outliving One's Offspring: During his conversation with Electra in Episode 14, we learn his son and grandchild were killed by the Neo-Atlanteans. Given he seems to have known Nemo since their initial exodus from Old Tartessos, the implication is they died either when the Tower of Babel blew or during Gargoyle's coup (or an unrelated incident).
• Scotty Time: Averted. He is more focused on doing the best repair work possible rather than maintaining a reputation as a miracle worker. Given how important the Nautilus is to the fight against Gargoyle, this is justified; there are no room for mistakes or shortcuts.

Voiced by: Amie Elyn (English, ADV Films dub)

Ikolina (or Ikoli) is the nurse of the crew and granddaughter of the Chief Medical Officer.

She's so popular she even has a fan club among the sailors.

• Hospital Hottie: So much she even has a fan club.
  • In Nadia's Omake Theater, she even won the Miss Nautilus contest!
• Raised by Grandparents: She has been raised by her grandfather, also present in the crew as medic.

Voiced by: Wener Lang (English, ADV Films dub)

The Doctor is The Medic of the Nautilus. Grandfather of Ikolina, he raised her.

• Everyone Calls Him "Barkeep": As with other crewmen, no name is ever given for him besides his position.
• Heroic Sacrifice: Attempted. During the final episodes, ordered his granddaughter to stay on the land before joining Nemo's final assault. He still managed to survive, though.
• The Medic: For the Nautilus.

Voiced by: Dan Sibee (English, Episodes 4-22, ADV Films dub), Brian Yanish (Episodes 36-39)

The Nautilus helmsman.

• Everyone Calls Him "Barkeep": Similarly to the Chief Engineer, no name or even pseudonym is known other than his title job.
• Manly Facial Hair: Has the most badass mustache onboard after Nemo.
• Sleeves Are for Wimps: Discards the standard Nautilus jumpsuit in favor of a tank-top. He even keeps the look (albeit while switching over to a new vest) when they transfer their flag to the N-Nautilus.

An Atlantean space-ship converted to submarine, the Nautilus is Nemo's main weapon against Gargoyle and his minions. Notable features of this ship are: ability to withstand high pressures and depths, exceptionally resistant Space Titanium armoured hull (the clear ports are made from Tektite), and water-jet magnetic propulsion. It has been launched on June 21, 1888.

The name of the original spaceship was the Eritrium, as is discovered by Jean and Nadia in episode 15, while the origin of the Nautilus is explained at the end of the series.

• All There in the Manual: The Omake give several informations about dimensions, armors and weapons.
• Break Out the Museum Piece: As an ancient Atlantean left around after their arrival on Earth; said vessel having been originally launched to the stars on Sidereal Year 7962.
• Shout-Out: Its original Atlantean name, Eritrium, is a tribute to GunBuster.

The N-Nautilus (alternately known as the New Nautilus) is one of ancient Atlantis' most powerful warships. Having been moored beneath Tartessos, it's reactivated after 12,000 years by Nemo's crew following the destruction of the original Nautilus.

• All There in the Manual: Technical details not revealed in the show proper but in the Omake. For instance, the Orpheus Furance draws power from aberrations in the gravitational field of two black holes orbiting one around the other. The ship also has other weapon systems which were damaged in previous battles, and cannot be repaired.
• Cool Ship: A flying subarmine!...kinda.
• Deflector Shields: Boasts Atlantean Barriers.
• Homing Lasers: Another of its primary weapons during the final battle above Paris.
• Shout-Out: Its original Atlantean name, Excelion, is another tribute to GunBuster (as are the homing lasers).

The Neo Atlantis is the organization born from the destruction of Tartessos after the putsch by Gargoyle.

Utterly ruthless, its main purpose is the restoration of Atlantean supremacy over the human race and Earth, both of whom it views as their property.

• A Nazi by Any Other Name: Between their armbands, their hoods like those worn by the Ku Klux Klan and their racial doctrines, the parallel is too obvious to even be missed.
• Big Bad: The true main antagonist of the series (with the organization being personified by Gargoyle).
• Boomerang Bigot: Most of them, if not all, are humans.
• The Coup: Launched one against the Queen of Tartessos.
• Dystopia Justifies the Means: They believe that, to bring peace among humans, the jackboots and the iron heels of Neo Atlantis are the best path for this. To do this, they will not flinch to methods such as massacres or mass enslavement.
• The Kingslayer: Murdered the Queen during their coup.
• Nebulous Evil Organisation: They managed to infiltrate the world economy (with them controlling most of the wool trade and entire currencies) and the governments (they managed to blame the sea monsters attacks on the Nautilus).
• Offscreen Villain Dark Matter: Averted; one of the starting mysteries (sea monsters) were attacks by Neo Atlantis submarines to control world trade. Financial sponsors are also present during the testing of the Tower of Babel; after all, supplies need to be paid, right?
• Putting on the Reich: Their armbands sport the Neo Atlantis symbols and their pointed hoods aren't to participate to the Holy Week in Sevilla, to put it mildly.
  • An Omake make it clearer by showing a propaganda movie inspired from Triumph of the Will.
• The Remnant: As stated by Nadia from her visions in the Red Noah, Tartessos transformed into Neo Atlantis.
• The Right of a Superior Species: As mankind has been created through genetic manipulation, Neo Atlantis holds them to be a Slave Race.
• Sigil Spam: Their eye symbol is spammed on their clothes and items.
• Take Over the World: Their unique objective is to reestablish the Atlantean ascendency over Earth.
• Technologically Advanced Foe: This is simultaneously their greatest advantage and greatest handicap. Since ancient Atlantis fell over 10,000 years earlier, nearly all advanced Atlantean technology and weaponry has been lost to history (or was sabotaged by Nemo in the series backstory). If they'd had any of this at their disposal 13 years ago, the Neo-Atlanteans would've easily steamrolled humanity and conquered the world. However, while the technology itself is gone, the Neo-Atlanteans still possess the collective knowledge of their ancestors; they're just limited by what can be reproduced with conventional 19th Century materials and technology. But what they can duplicate remains far more advanced than anything in the current era and allows them to outlcass late 19th Century hummanity and hold their own against Nemo and the similarly technologically advanced Nautilus. This is also why Gargoyle is so hellbent on acquiring the Blue Water: it's the control key for locating and accessing the one cache of ancient Atlantean technology and weaponry that Gargoyle knows is still intact somewhere on the planet (i.e. Red Noah).

^{Click here to see his real face}

Voiced by: Motomu Kiyokawa (Japanese), Steve Bulen (English, Streamline dub), David Jones (English, ADV Films dub)

Thirteen years before the start of the series, Gargoyle, formerly Nemesis la Algol, overthrew the Queen of Tartessos before reactivating the Tower of Babel to threaten other nations but his plan was foiled when Nemo removed the Blue water from the Tower, causing the city to be destroyed.

Since then, Gargoyle rebuilt his organisation, now Neo-Atlantis, and waged revenge against Nemo while remaking some of the Atlantean superweapons.

Vain and cruel, in the end revealed himself to be one of the humans he despised so much.

• Alas, Poor Villain: In spite of all the evil and destruction he's responsible for, you can't help feeling just a very small scrap of pity for Gargoyle in his final moments as he realizes his entire life was built upon a lie. The look on Nemo's face in Gargoyle's dying moments is quiet pity for his onetime friend-turned-mortal enemy.
• Arch-Enemy: The face of Neo-Atlantis and the most personal foe to Nemo, Nadia, and the rest.
• Bad Boss: Once, to show an imprisined Nadia how badly he wanted to know where was her Blue Water, he shot one of his own soldiers, telling her Marie or King might be next. Averted in other cases, where no punishment will befall unlucky soldiers.
• Badass Finger Snap: One of his defining Character Tics.
• Boomerang Bigot: Hates humans. Is human himself.
• Card-Carrying Villain: When Nadia called him inhuman over his crimes, he treated it like a compliment. Of course, since he fancies himself as being more than human.
• Cool Mask: Like the rest of his followers, but Gagoyle's is easily the most ornate of all the Neo-Atlantean masks we see in the series.
• Evil Chancellor: Used to be the Prime Minister of Tartessos during his coup. Nowadays, has more power than Emperor Neo.
• The Faceless: He's masked for the entire series. We only get glimpses of his real face from Nemo's holographic family portrait (which is 13 years out of date) and after Elektra shoots out the right side of his mask in the penultimate episode. We finally see his face in full, albeit briefly, during his death in the finale.
  • On a Meta level, David Jones admitted on the original DVD interviews that voicing a faceless character and not having to worry about matching lip flaps, unsurprisingly, made for a relatively stress-free dubbing experience.
• The Kingslayer: In addition to murdering the Queen, he also unplugged Neo when he rebelled.
• Kinslaying Is a Special Kind of Evil: It's not explicitly stated in the series. But if you go with the interpretation that Gargoyle was an adopted brother of Nemo's, then he’s quite guilty of this. He's responsible for the death of Nemo's wife during the coup. He also tries to kill Nemo's son when the latter shakes off his Mind Control in the finale.
• The Man Behind the Man: Controls Emperor Neo and later uplugs him after he rebels.
• Walking Spoiler: You might get a lot of the story simply by reading Gargoyle's biography.
• We Used to Be Friends: He and Nemo were very close before his coup and betrayal.

^{Click here to see him in Old Tartessos}

Voiced by: Kaneto Shiozawa (Japanese), Dan Dietz (English, ADV Films dub)

Emperor Neo Icon Epiphanes, born Benussis, is the titular emperor of Neo Atlantis. In reality, he's nothing but a puppet in the hands of Gargoyle since his cyborgisation and brainwashing.

In the last episodes, we learn he's Nadia's brother.

• The Atoner: After he woke up, he told Nadia he wanted to live among humans.
• Blue Blood: Is of Atlantean royalty.
• Dark Lord on Life Support: Since the Doom of Tartessos.
• Determinator: Has to qualify for this, since he was capable of moving his robotic body on sheer Heroic Willpower to crush the Mind Control apparatus holding Nadia, EVEN after Gargoyle unplugged him. Gargoyle was understandably gasping This Cannot Be! at witnessing "one's willpower surpass the power of science".
• The Emperor: He's emperor of Neo Atlantis.
• Full-Conversion Cyborg: Is one since the Week of Fire. Gargoyle rebuilt his body.
• Matricide: Is rumored to have murdered the Queen, or at least allowed the deed.
• Mind Control: Gargoyle arranged for Neo to have his consciousness and memories wiped clean, to better control him. Unfortunately for him, he didn't totally remove these.
• Puppet King: Make no mistakes, Gargoyle is the one who's really running the show.
• Spell My Name With An S: Venussis or Benussis? Depends on how do you phonologically separate "B" and "V."
• Used to Be a Sweet Kid: Nadia has a vision of his soul during his dying moments, and he was a very cute and sweet child before Gargoyle turned him into his puppet.
• Unwilling Roboticization: When he woke up from brainwashing, he was absolutely not happy to see himself turned into a robot, though he is capable of being a Deadpan Snarker about it as Gargoyle realizes he can't stop him as easily as a human being by shooting at him.
  I WONDER WHO IT WAS THAT CHANGED MY ATLANTEAN BODY INTO IRON?

Voiced by: Chikao Ohtsuka (Japanese), Grant James (English, ADV Films dub)

A Neo-Atlantean scientist in Gargoyle's employ. Following the deaths of Gargoyle and most of the organization aboard Red Noah in the series finale, Giger seizes control of the Neo-Atlantean remnant and tries to pick up where his master left off.

• Big Bad: Of The Motion Picture
• Remember the New Guy?: Geiger is stated to have been one of Gargoyle's top scientists, but he was never mentioned in the series. Justified in-universe, though, as characters and viewers alike only saw Neo-Atlantis through the lens of Gargoyle himself and not through other global branches of the organization.

^{Click here to see the ship's robot}

Voiced by: Russ Roten (English, ADV Films dub)

Red Noah is one of the three Space-Arks used by the ancient Atlanteans to leave their home in the M78 Nebula and to reach the Earth 2 million years before the events of the series.

When Atlantis fell 12,000 years ago, the ship went missing during the upheaveal and its final fate remained unknown until the Island Arc. Red Noah finally reveals its nature when Nadia and Jean enter the ship in episode 30-31, as a giant flying saucer operated by a sentient android, which wants to bring Nadia to Atlantis in order to start a new Atlantean empire.

Eventually, Red Noah is retrieved by Gargoyle during the Closing Arc to serve as the ultimate weapon to complete the ascednancy of Neo-Atlantis and the subjugation of humanity.

• Alien Invasion: Arguably qualifies as part of an alien invasion scenario/fleet given ''Red Noah' carried Atlantean refugees to Earth 2 million years ago and they re-shaped the planet and its biosphere to their whim.
• All Myths Are True: Red Noah and its sister Ark-Shhips are the basis for the Biblical legends of Noah and his Ark.
• Deflector Shields: Like the N-Nautilus, it's equipped with Atlantean barriers.
• Flying Saucer: Literally, which plays into the Alien Invasion aspect.
• Mile-Long Ship: It's *massive*, dwarfing the N-Nautilus and a good chunk of Paris.
• Outside-Context Problem: To late 19th Century humanity, which is why locating and securing the vessel's so crucial to Gargoyle's endgame. This is an ancient vessel outfitted with weaponry that could crack a planet. Mankind has absolutely no means of defending itself against Red Noah or fighting back.
• Wave-Motion Gun: It's primary weapon is its own Tower of Babel.

^{Click here to see him after the Time Skip}

Voiced by: Hiroshi Masuoka (Japanese), Clifton Wells (English, Streamline Dub), Edwin Neal (English, ADV Films dub)

Henri is Jean's uncle, who's housing him since the departure and the diseappearance of his father.

Fun-going, he also loves engineering.

• Cool Old Guy: In addition to his love of inventing, is also fond to enjoying himself in Paris, as his wife is complaining about, as he think we live only once, thus we can do the most of it.
• Gadgeteer Genius: Fond of inventing things, albeit his wife is trying to rein him.
• Manly Facial Hair: The firt, but my no means the last mustache introduced onto the series.

Voiced by: Natsuko Fuji (Japanese), Edie Mirman (English, Streamline Dub), Lana Dietrich (English, ADV Films dub)

Julie is Henri's wife.

She's more concerned with the family finances, given the dent Jean and his Uncle's engineering experiments have put into them.

• Apron Matron: Sports one, is protective of familial finances against the costs of the inventions of her nephrew and husband.
• Obnoxious In-Laws: Averted. Even though her first meeting with Nadia led Aunt Julie to reproch Jean Nadia's skin colour, in the epilogue they seem united to rein in Jean and Henri's runaway engineering.
• Racist Grandma: Use less than enlightened arguments against welcoming Nadia. Justified since it was 1889.

• The Cameo: In The Motion Picture, albeit as a family photograph (which gives us our first and only look at him).
• The Captain: Commanded a ship when he vanished.
• Dead to Begin With: In Episode 16, Eiko reveals he served on the same ship as Jean's father whne it was attacked by the Neo Atlantis. Eiko confirms Mr. Raltique died in the sinking.
• No Name Given: Jean's father has not been ascribed any name in the canon.

The son Nadia and Jean had together during the interim between the climax and Distant Epilogue.

• All There in the Manual: His name isn't revealed in the epilogue, but in supplemental materials.
• Generation Xerox: Sports glasses and red hair, just like his father (while his skin tone's a mixture of Jean and Nadia's).
• Half-Human Hybrid: Not explicitly pointed out in the epilogue, but the kid's obviously one due to Jean being human and Nadia being an Atlantean.

Voiced by: Masahi Ebara (Japanese), Ken Webster (English, ADV Films Dub)

Gonzalez is Grandis's former fiancé, who despoiled her and her father from their wealth.

Vain, greedy and dishonest, he will attempt to steal the idol of a village, using King as a hostage.

• Arc Villain: Of the Africa episodes.
• Ascended Extra: Appears in flashback during Episode 12 and mainly to establish Grandis' backstory as ruined aristocrat. He then returns in the Present Day 20 episodes later and serves as the villain of the Africa episodes.
• Dastardly Whiplash: Just look at that screenshot.
• Evil Colonialist: Has no issue stealing artifacts from tribes, viewing this process as beneficial.
• Gold Digger: He stole Grandis and her father's wealth and is nowadays stealing artifacts across Africa to sell these.
• Small Role, Big Impact: Even before he shows up in Africa, he has a major impact on the series backstory. His fleecing of Grandis led to her impoverishment and the creation of the Grandis Gang. If the Gang had not been the ones to try and collect on Nadia's bounty in the Pilot, the series would never have unfolded the way it did (replete with the Gang platying a crucial role in the war with Gargoyle).

Voiced by: Katsuhei Yamaguchi (Japanese), Cory Cruser (English, ADV Films dub)

• Improbable Age: Claims to be born on January 1877, making him 13, even though he looks very adult.
• Romantic False Lead: He turns out to be engaged to Murumuru.

• Action Girl: Managed to save the situation against Gonzalez.

Voiced by: Shigeo Sasaki (Japanese), Bill Capizzi (English, Streamline Dub), Titos Menchaca (English, ADV Films Dub)

• The Alcoholic: Implied based on how the Grandis Gang finds him when they visit the Circus. It may also explain his abusive behavior.
• Bad Boss: Brutally trained Nadia, had her publicly perform dangerous stunts, as a minor, in revealing outfits, refused to hear her fears about her security after she meet the Grandis gang before outright selling her to these.
• Bald of Evil: Arguably qualifies due to his abusive nature.
• Drill Sergeant Nasty: Cracked a whip to force Nadia to train up rope walking.
• Hat of Authority: Wears a top hat.
• High-Class Glass: Sports a monocle, either in the first episode and in Nadia's flashbacks.
• Illegal Guardian: Seems to have viewed Nadia only as an income stream, without any concern for her well-being.
• Karma Houdini: There's no mention in canon of him receiving any punishment for abusing Nadia, apart for him to lose his top-earning performer.
• Laser-Guided Karma: Sold Nadia to the Grandis gang for Counterfeit Cash out of greed; as a result, he lost his top earning performer with nothing to show than strips of funny coloured paper which might cause him legal issues with police.
• Small Role, Big Impact: While he only appears in the Present Day in the Pilot, his selling Nadia to Grandis is one of the catalysts for the plot. More importantly, flashbacks to Nadia's early years with the Circus reveal his multi-level abuse (verbal, emotional, and physical) were *crucial* to shaping Nadia's own flaws and dysfunction in the Present.

Voiced by: Teiji Ōmiya (Japanese), Michael Forest (English, Streamline Dub), Eric Henshaw (English, ADV Films Dub)

Captain Melville is the commander of the USS Abraham Lincoln, tasked with fighting the sea monsters, a task which obsesses him.

• The Captain: Well, duh.
• Horrible Judge of Character: Hey, trusting a masked man to give you reliable info about your enemies isn't the smartest thing to do, apart of you want to destroy someone who really fought these monsters.
• Insane Admiral: Technically a Captain, but the basic trope still applies. Melville is obsessed with crushing the sea monsters and became even more so after the damage and losses suffered by the Abraham in Episode 03.
• Manly Facial Hair. Well, he certainly has the most...unique mustache of the entire show.
• Unwitting Instigator of Doom: His obsession with the Sea Monsters allows him to get suckered into Gargoyle's False Flag Operation. He ends up not only nearly killing the very people trying to save them from the actual 'sea monsters', but the damage he inflicts on the Nautilus claims the lives of Ensign Fait (and nearly breaks Jean).
• Whatever Happened to the Mouse?: His ultimate fate following the events of Episode 15.

Voiced by: Shinya Otaki (Japanese), Clifton Wells (English, Streamline Dub), Huck Huckaby (English, ADV Films Dub)

Captain Melville's First Mate aboard the USS Abraham Lincoln.

• Number Two: Well, duh.
• Whatever Happened to the Mouse?: Like Melville, his ultimate fate following the events of Episode 15.

^{Click here to see her original character design}

Voiced by: Ellie McBride (English, ADV Films dub)

The Queen of Tartessos was the wife of Nemo and the mother of Nadia and Neo.

She was murdered during a coup by Neo Atlantis and Gargoyle, but her spirit still resided in Blue Water.

She diseappeared after Nadia used her stone to resurrect Jean.

• Art Evolution: The Queen's character model changes between its Early-Bird Cameo in Episode 16 and subsequent flashback apperances. The redesign is closer to Nadia's look (and is for all intents an adult Nadia), visually confirming the two are related.
• Early-Bird Cameo: She first appears briefly as a vision in Episode 16 when Nadia tries to throw the Blue Water into the ocean.
• Everyone Calls Him "Barkeep": We never find out what her actual name is.
• Heroic Sacrifice: Accepts sacrificing her own soul and the collective souls of Atlantis to ensure Jean's resurrection.
• The High Queen: Was the ruler of Tartessos (alongside Nemo) before the regicide.
• Mama Bear: Acted to protect her daughter Nadia and finally accepted to sacrifice herself for her happiness's sake.
• No Name Given: Her Majesty wasn't named in the series
• Spirit Advisor: Played with. As the dominant soul within Nadia's Blue Water, the Queen is present and watching out for her daughter all her life and throughout the series. However, they don't communicate verbally, as any warnings are issued through the jewel's pinging and lighting changes. So Nadia has no idea she literally carries her mother with her and they don't actually speak one-on-one until the final episode when she makes her plea to ressurect Jean.

Voiced by: Hitoshi Yagaki (Japanese)

An elderly, sentient Whale living at the South Pole.

• Animals Not to Scale: Irion is gigantic even by whale standards. It's likely due to the genetic engineering employed by the ancient Atlanteans during their experiments to find a suitable servant race.
• Small Role, Big Impact: While he only appears in one episode, his conversation with Nadia sets up the introduction of her brother Neo. His sentience is also the first major foreshadowing for the genetic engineering experiments the ancient Atlanteans performed on Earth's biosphere.
• Uplifted Animal: Due to Ancient Atlantean genetic engineering.

Voiced by: Mai Kadowaki (Japanese)

A blonde girl from a wealthy American family. In reality, she is the clone of an Atlantean royal family member, who, unknowingly to her, has a third Blue Water... in the place of her own heart.

• Canon Foreigner: Only appears in the 2005 video game.
• Clones Are People, Too: She can be saved from death with the power of the three Blue Waters in one of the game's possible endings and become a full-fledged human and Jean's future wife in the timeskip. In all the other endings, she dies.
• I'm Having Soul Pains: Several times about the Nautilus, she experiences stomach aches whenever Nadia's Blue Water starts flashing, which is because of her own Blue Water located in the place of her heart.
• Jerkass: Equal to Nadia in her self-centeredness.
• Ojou: Lazu refers to her as this.

Voiced by: Emi Kobayashi (Japanese)

Sophia's maid who's actually a Neo-Atlantean spy.

• Canon Foreigner: Only appears in the 2005 video game.
• Emotionless Girl: She rarely shows any emotion, except when she preceives Sophia is threatened.
• Heroic Sacrifice: Betrays Gargoyle and kills herself along with several Neo Atlantean soldiers to save Sophia. However, in the Windows version of the game, she may potentially survive and end up married to Jean, as she's included as one of the possible romantic interests in the Win version.
• Kuudere: Despite coming off as an Emotionless Girl, she later
• Meganekko: Wears a pair of round glasses on her cute face.
• Meido: Wears a maid outfit for most of the game.
• The Mole: Is actually a spy for Gargoyle. However, she betrays him.
• The Quiet One

Voiced by: Hidenobu Kiuchi (Japanese)

Sophia's father and the owner of an American technological company, nicknamed the 'king of technology'. It turns out he was aware of the fact that Sophia is not his biological daughter, but an Atlantean clone, whom he found when exploring the ruins of ancient Atlantis.

• Canon Foreigner: Only appears in the 2005 video game.
• Redemption Equals Death: Apologizes to Sophia and acknowledges his mistakes before his death.