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Season 1
Gackt/Gaito
"The days of leaving the sea to the devices of humans are over!"
What does it look like? Seriously, though, Gackt (Gakuto in some scanslations, Gackto in the Del Rey print, and Gaito in the anime) is a self-obsessed pretty-boy prince that somehow manages to wear a fur coat and sit in a hot tub underwater. The main antagonist of the first arc, his aim is to trap the seven princesses in People Jars, use their pearls to summon the great Aqua Regina, and destroy the world as revenge for his people, whom she sealed underwater millennia ago to punish their king. At least, that's what he says his motivation is. He may not do much but drink wine, hold roses and order his harem around, but he holds formidable power, and he's out to double it — and Kaito just may be the key to do that.
Birthplace: Panthalassa Kingdom
Age: 20
Birthday: November 21
Voiced by: Daisuke Kishio (Japanese), Javier Moreno (Spain)
Tropes associated with Gackto:
- A Glass of Chianti: Often seen drinking wine on his throne... even if he's underwater.
- Anti-Villain: It's easy to pity him once you see how devoted he is to Sara and learn of his past.
- Big Bad: Of the first arc.
- I Have You Now, My Pretty: He really seems to like doing this; maybe he thinks it'll add to his battle harem.
- Love Makes You Evil: At first. He is madly in love with Sara, so when she tells him she wants to destroy the world he complies with her wishes.
- Love Redeems: Once Sara herself is redeemed, his love for her is what eventually turns him to the side of good.
- No Celebrities Were Harmed: Named after Gackt and modelled after him a bit as well.
- No, Mr. Bond, I Expect You to Dine: Invites Rina to dance with him in one episode.
- Redemption Earns Life: He is revived in the last episode (dubious canon).
- Redemption Equals Death: His end in the anime.
- Schrödinger's Cast: Lives in the manga, dies in the anime.
- Sealed Good in a Can: His end in the manga.
- Spell My Name With An S: Has three appropriate names in canon itself, besides the erroneous ones.
- Suck My Rose: Has roses around on his person for this specific purpose.
- Villainous Breakdown: After Sara's Heel–Face Turn.
- We Can Rule Together: Offers this to Kaito near the end.
Dark Lovers (Izuuru, Eriru, Yuuri and Maria)
"The Dark Lovers will never die until I've captured Gackto-sama's heart!"
These four strange women were Gackto's childhood companions under the seal, a group of sea creatures that he magically transformed into his own personal harem. Think about that for a minute. They're all completely devoted to him, but he plays with their hearts for his own ends, leaving them frustrated, eager to please, and constantly feuding with each other. When they combine their powers, however, they're a devastating force indeed.
Tropes associated with the Dark Lovers:
- Anti-Villain: Yuuri and Eriru. Izuuru and Maria have the same sad backstory, but their obsessions turned them a little less sympathetic.
- Aw, Look! They Really Do Love Each Other: Despite viewing each other as rivals for Gackto and arguing, it is shown that they do each consider each other friends.
- Childhood Friend Romance: Of the Unlucky kind: It turns out that they were Gackto's only friends as a kid.
- Four Is Death: There are four of them, and they are villains.
- Dungeon Bypass: Yuuri in episode 10. She and Eriru were lost in a maze cave, she just blasted the wall saying "If it's like this the maze is no problem!"
- Mad Love: They have it for Gaito.
- Perky Female Minion: Yuuri. Eriru's friendly personality is an even better fit.
- Quirky Miniboss Squad: Of the first season.
- Redemption Earns Life: They are all revived in the last episode. But keep in mind that the canonicity of that is dubious.
- Undying Loyalty: All of them towards Gackto even choosing to return to him when he’s about to die, ensuring that they will die as well.
- You Have Failed Me: Gackto rotates through giving the Dark Lovers attention depending on who's failed recently.
Izuuru
Age: 30
Voiced by: Sayori Ishizuka (Japanese), Elena Ruiz de Velasco (Spain)
- Love Martyr: All of them, but Izuuru takes this up ten notches.
- Spell My Name With An S: Izuru or Izul.
Eriru
Age: 18
Voiced by: Yuki Matsuoka (Japanese), Miriam Valencia (Spain)
- TheDitz/FriendlyEnemy: Her nice personality.
- Glowing Eyes of Doom: Her evil personality has glowing red eyes.
- Jekyll & Hyde: Her first personality is friendly and harmless. Her second, on the other hand...
- She also has a third personality in the anime, which isn't very frequently seen. This one is distinctive for having more detailed eyes. In it, she's neither as perky or as evil as the other two; she is instead observant and thoughtful and can make some really insightful comments.
- Ninja Pirate Zombie Robot: A rastafari with cat ears and black feathered wings.
- Red Eyes, Take Warning: When she's evil.
- Spell My Name With An S: Eril.
- Split Personality: As mentioned above, she changes personality whenever she spins.
Yuuri
Age: 12
Voiced by: Chieko Honda (Japanese), Raquel Martín (Spain)
- Bratty Half-Pint: And when she tries to act like an adult, she always looks more childish.
- Dating Catwoman: Hippo with Yuuri, later on.
- Enfant Terrible: She's a kid and a villain, so...
- Friendly Enemy: She later on tries her best to resist becoming this or pulling a Heel–Face Turn.
- Interspecies Romance: Besides their fixation on Gackto, Yuuri eventually falls in love with Hippo.
- Personality Powers: The obnoxious Yuuri's loud piano.
- Precocious Crush: She looks and acts about nine. Gackto treats her like the black sheep of the harem because he doesn't like little girls (not that he loves any of them), which almost causes her to Heel–Face Turn out of spite.
- Spell My Name With An S: Yuri.
- The Virus: Yuuri's piano music.
Maria
Age: 25
Voiced by: Sanae Kobayashi (Japanese), Ana Plaza (Spain)
- An Ice Person: Maria.
- Berserk Button: Calling her old.
- Harmless Freezing: Her powers.
- Personality Powers: The cold Maria's ice.
Black Beauty Sisters (Mimi and Sheshe)
"Are you done yet? Now it's time for our own 'live start'."
Not actually sisters. Probably. We hope. The Black Beauty Sisters are a mercenary couple of anglerfish turned into girls, who take the stage as enemies in both arcs. Unlike the Dark Lovers, who are motivated by love, and the Winged Ones, who are motivated by duty, the Black Beauty Sisters only care about what rewards will come out of working for Gackto and Michel. They're strong enough to pose a major threat to anyone they face — except their bosses, that is.
Voiced by: Noriko Shitaya (Mimi), Miki Tsuchiya (Sheshe), Carmen Podio (Mimi, Spain), Carolina Tak (Sheshe, Spain)
Tropes associated with the Black Beauty Sisters:
- Anti-Villain: Mimi becomes this halfway through Pure. Sheshe only when they're about to be consumed by Michel.
- Ascended Extra: Brought back from the first arc into the second.
- Catchphrase: Mimi's "She's right, isn't she?"
- Day in the Limelight: Episode 79 is about them having a fight and Mimi going to land to try to fight the mermaids alone.
- Death Equals Redemption: Their spirits briefly show up to help the cause of good in the last chapter of the manga.
- Even Evil Has Loved Ones: They genuinely love and care about each other.
- Eviler than Thou: Well, they try, anyway.
- Fair Cop: In one episode, they dress up like this.
- Image Song: "Kuro no Kyousoukyoku ~concerto~" ("Dark Concerto ~concerto~") and "Yami no Baroque" ("Baroque of Darkness").
- Little Bit Beastly: Anglerfish women with fin ears.
- Line-of-Sight Name: Mimi calls herself "Mari" as a human after spotting a pot of marigolds in the window.
- Monster of the Week: They're the only ones to summon them.
- Redemption Earns Life: They are revived in the last episode (watch out for dubious canon).
- Seme: Sheshe; taller, more aggressive, and always initiates contact with Mimi.
- Uke: Mimi; smaller and more fragile looking, as well as quieter.
- You Are Worth Hell: They don't care what happens to them so long as they are with each other.
Season 2
Michel
"Just what am I!?"
Michel, the main villain of the second arc, is a cruel, manipulative angel who attacks the weak and blackmails the mermaids to enlist them in his self-declared war against humans. Still, Michel is sympathetic in his own way. He's being used the entire time, given painful "medication" that only makes him weaker and drives him slowly into insanity. In there somewhere is a good person, but as long as he's absorbing people whom Lucia loves, it's hard to tell.
Voiced by: Junko Minagawa (Japanese), Fernando Cabrera (Spain)
Tropes associated with Michel:
- Big Bad: Of the second arc.
-
Cross-Dressing Voices: Voiced by Junko Minagawa. - Crystal Spires and Togas: His original home. What's more, he actually wears a toga, albeit a rather unorthodox one.
- Image Song: "Tsubasa wo Daite" ("Accept my Wings").
- Laser-Guided Amnesia: He not only induces it but has it himself.
- Life Energy: One of his goals is to steal it from powerful beings to become stronger; this eventually begins to consume him.
- Light Is Not Good: Not really surprising considering he's an angel, though its possible that the original intention was simply to depict him as villainous, since white has traditional connections with death in Japan.
- Mission from God: Or so he thinks.
- Perpetual Molt: His wings may never run out of feathers.
- Power Gives You Wings: He already had them, but he gets more.
- Shirtless Scene: The aforementioned unorthodox toga.
- Spell My Name With An S: Mikeru.
- The Pawn: He's just a fake form of a fossil created by Fuku.
- Villain Song: "Tsubasa wo Daite" ("Accept my Wings").
- You Have Failed Me: Gackto, at least, was nicer about it than this guy.
- Villainous Breakdown: On top of everything that happens to him, the medication is driving him crazy.
Winged Ones (Lady Bat, Lanhua, Alala)
"You made the ones you call trash... so what are you?"
Reanimated from the ancient past, these three join the Black Beauty Sisters as enemies who can use music just like the mermaids. They are Michel's servants and do whatever he asks out of respect and duty, but they know a secret that even he doesn't, which Fuku is trying desperately to keep them from telling.
Tropes associated with the Winged Ones:
- Asshole Victim: Played fully in the anime. Because of their self-infatuated and villainious behavior, it's hard to feel bad for them when Michel absorbs them into himself once he declares that now he is complete and at full power after abosrbing his second half, Michal into himself, he no longer has any use for them at all.
- Death Equals Redemption: Their spirits briefly show up to help the cause of good in the last chapter of the manga. Averted in the anime, where they do not appear in final battle nor redeem themselves at all.
- Failure Is the Only Option: No matter how hard they try, they never succeed in capturing Mermaid Princesses at all. Even Dark Lovers had more successes than them.
- Four Is Death: With the Black Beauty Sisters together taking the fourth slot.
- Quirky Miniboss Squad: Of the second season.
- Winged Humanoid: It's never specified what their specific species are.
- You Have Outlived Your Usefulness: Once Michel declares that now he is complete and at full power after abosrbing his second half, Michal into himself, he declares how he no longer has any use for them at all and eventually absorbs them into himself.
Lady Bat
Voiced by: Sanae Kobayashi (Japanese), Elena Ruiz de Velasco (Spain)
- Bifauxnen: Lady Bat has a tomboyish, masculine appearance, but she is female.
- The Dragon: Implied to be this to Michel. Both in the anime and in the manga she's the first Winged One to appear and she seems to be the one most loyal to him. In the manga, Michel sends her and her only to capture the mermaids while he kidnaps Michal. In the anime, Michel sends all 3 Winged Ones instead, but it's Lady Bat ordering Lanhua and Alala around.
- Image Song: "Ankoku no Tsubasa" ("Wings of Darkness").
- Kiss of the Vampire
- Lesbian Vampire: She states that she will give her love to the mermaids frequently.
Lanhua
Voiced by: Megumi Kojima (Japanese), Pilar Aguado (Spain)
- Image Song: "Hana to Chou no Serenade" ("Serenade of Flowers and Butterflies").
- Involuntary Dance: Her song makes the mermaids dance.
- Smug Snake: She is seriously vain, narcisstic, smug and egoistical, constantly refering herself as beautiful while viewing mermaids like inferior.
- Spell My Name With An S: Ranfa/Ran Fa/Lang Fa.
- Super-Deformed: Her power has the side effect of splitting her into a bunch of chibi versions of herself.
Alala
Voiced by: Masayo Kurata (Japanese), Carmen Cervantes (Spain)
- Evil Diva
- Image Song: She has two: "Star Mero Mero Heart" ("Star Burning Up Heart") and "Oh, Yeah! Alala!"
- "I Am" Song: "Oh, Yeah! Alala!"
- Kawaiiko: She is obnoxiously cutesy, enough to make Hanon roll her eyes and groan.
- Minion with an F in Evil: She poses the least threat out of the three.
- Perky Female Minion: Fits it much less than Yuuri does, though.
- Spell My Name With An S: Arara.
Fuku-chan
"Listen to me, because my words are Michel-sama's words, and Michel-sama's words are the Great One's words."
Fuku-chan is Michal's realistically drawn pet bird, who lives in a cage by her window. Fuku-chan is also Michel's simply drawn bird sidekick with a chibi human head and a halo. Tiny, arrogant and shrewd, he transforms and slips between these identities with no one the wiser, and tends to get slapped, thrown and snarked at by the Black Beauty Sisters and Winged Ones on the grounds of being a small annoying thing. Fuku-chan isn't as harmless as he seems, though; he talks back to the Great One himself, he administers Michel's medication and keeps secrets from him, and only he knows the truth about Michal.
Voiced by: Sanae Kobayashi (Japanese), Elena Palacios (Spain)
Tropes associated with Fuku:
- Beware the Silly Ones: Spends most of the season as The Chew Toy and the Small, Annoying Creature. The final act has him pull a Villain Override on the Big Bad himself to try to Kill All Humans.
- Deal with the Devil: Do not trust the little chibi bird-thing.
- Evilutionary Biologist: He created Michel and all the other weird experiments around their lair.
- Light Is Not Good: He has a white bird body and a golden halo.
- Not-So-Harmless Villain: Turns out he has been manipulating Michel from the start and can take him over anytime he wants.
- The Man Behind the Man: To Michel.
- Villain Override: He hijacks Michel with Demonic Possession for one last go at the Heroes.
The Great One
A giant talking flame living ontop of Michel's castle. He is the one creating the Winged Ones.
Voiced by: Hajime Iijima (Japanese), Nacho Aramburu (Spain)
Tropes associated with The Great One:
- Animate Inanimate Object: He's a living flame.
- Heroic Sacrifice: He does this in order to destroy Michel's fossil.
- I Did What I Had to Do: He sacrificed his body and revived Michel only to save Michal's life.
- Luke, I Am Your Father: Later revealed to be Rihito and Michal's father. Although instead of being told by him, Rihito was able to recognize him by his voice.
Sea Snake
Tropes associated with Sea Snake:
- We Hardly Knew Ye: He is never seen again after Mikeru absorbed Seira.
Galeos
A water demon summoned by the Black Beauty Sisters in episode 55 to capture Lucia, Hanon and Rina.Tropes associated with Galeos:
- The Smart Guy: In order to counter Hanon's song, he picks up a pair of earmuffs to cover his ears. And succeeding!
- We Hardly Knew Ye: He returned to his original form after being defeated and never seen again.
