Evil Twin / Anime & Manga

• The entire premise of Blood+ is of vampire-like creatures originating from two twins who were born from the womb of the mother, and they turn out to be Saya and Diva, the heroine and villainess. As part of an experiment, the natural scientist who hatched them raises Saya as his own daughter and locks Diva in a tower to be a guinea pig. Saya is raised as a normal human girl; Diva is experimented on and denied anything more than a blanket and a meager amount of food. Thus, Saya grows up seeing humans as equals; Diva grows up seeing humans as torturers and also food. They look alike except for the fact that Saya has red eyes, and Diva has blue eyes, referencing the colors of the veins and arteries in human beings.
• The evil twin was actually a major plot point for Blue Seed since Momiji Fujimiya's twin Kaede Kunikida was called in first to deal with the evil plant monsters, due to her family's bloodline power. But Kaede had become so depressed and bitter after being seen solely as the local Barrier Maiden and not as a person... that she ended up faking her own death to join the monsters' side. Except not, she had her own plans.
• Subverted in Chobits. Freya, Chii's sister, at first glance appears to be Chii's dark side/evil twin/dark thoughts, The Enemy Within or just the highly-knowledgable Split Personality to Chii's innocence, but actually turns out to be looking out for Chii's safety, supplying her with information and intervening in preserving Chii when necessary.
• Daltanious has a clone variant with Harlin and Kloppen. Kloppen is a vile, authoritarian Prince who kills his own generals and wants to murder Harlin's son Kento for opposing him, while Harlin, despite his origins, is humble and kind and always offers friendship to Kloppen despite his heinous actions.
• In Dance in the Vampire Bund, the head of Telomere is revealed to be one to Princess Mina Tepes herself. The former looks like the latter, smells like the latter, and can command those blood-bound to the latter. Aside from personality, the only way to tell them apart is their Super Mode (one changes into a statuesque woman with bat wings and rather revealing spiked armor, from what we have seen the other changes into... something else).
• In Dragon Ball Z:
  • While not an actual twin, Turles, from the third movie (The Tree of Might), looks and (in the original Japanese, where he was voiced by Masako Nozawa) sounds just like Goku. His goals are slightly more sophisticated versions of what Goku likes to do: enjoy fine foods and engage in battles. It's possible he was meant to represent what Goku would have grown up to be like had it not been for Grandpa Gohan.
  • In the same vein, Majin Buu's two forms. The thin Buu, the one formed out of steam seems to act entirely evil, while the 'original' Fat Buu (aka Mr. Buu) often makes the 'good' choice, especially after the split. Though they don't look all that much alike until the reabsorption.
  • Kami and Great Demon King Piccolo aren't quite twins, either, but close enough—Kami split the (then evil) Piccolo out of himself so he could be a benevolent God over Earth, and they're genetically identical. Furthermore, you could compare Shen Long to his Black Star counterpart.
  • In Dragon Ball Super, Goku gets another evil doppelganger called Goku Black. In stark contrast to Goku, he is pure evil, being a sadistic mass-murderer who causes a second apocalypse in Future Trunks' Bad Future. Played with in that while his face and voice (he is also voiced by Masako Nozawa and Sean Schemmel) are almost identical to Goku's, Black is otherwise completely different in every other way: his fighting style is refined and technical, compared to Goku's somewhat crude and mostly self-taught style; he's lean (though still clearly muscled) where Goku is burly; and he speaks with a clear, very formal speech pattern (presented in the dub as a Fake Brit voice after going Super Saiyan Rosé), where Goku has a heavy, uneducated "hick" accent. Even Beerus remarks when watching them fight that despite similar appearances, Black clearly feels different from Goku. The reason is because Goku Black is the end result after one alternate version of the Kaioshin-in-training Zamasu used the Super Dragon Balls to switch bodies with an alternate Goku and killed him.
• Subverted in an episode of the second season of Duel Masters... In a town populated entirely by sets of twins, it's suggested that one group is the evil twins... Until it's revealed that they're all evil.
• Fairy Tail tries to play Jellal up as Siegrain's evil(er) twin. The former reveals by the end of the arc he's introduced in, however, that Siegrain was an illusion created to slip into the council and use their magic. They are actually one and the same. In truth, he is actually an inversion of this trope with Mystogan, who is the Jellal of an alternate dimension (Edolas) and a member of Fairy Tail in Earthland.
• Fran of Franken Fran was built by Dr. Madaraki to serve as his apprentice. When one of her assistants is killed in a way that she can't prevent, she discovers the existence of her "sister" Veronica, built to serve as Madaraki's bodyguard. Unlike Fran, who will not condone a person's death if it can be prevented, Veronica will quite enthusiastically kill someone if it benefits her. Fran very quickly shoves a Restraining Bolt into Veronica's brain, and she settles into being a devil's advocate for her sister.
  • Slightly subverted in that "evil" assassin Veronica also believes in giving people quick and merciful deaths (she is a Cold Sniper) while the "good" Fran will keep people alive at any cost, whether she has to reduce a human being to a head attached to a hand by cramming as many organs as she can into their skull or connect an entire family (that Victoria blew up in the first place) into one giant organism.
  • It is even more subverted if you realize that Veronica isn't that evil — her problem is that she has a very twisted sense of morality. Not entirely her fault since she was created to be an assassin bodyguard in the first place.
  • Gavrill seems to be older than Fran, but in appearance she's Fran gone the path of killing, drugs, crime and cannibalism, with only the clothes, a different hair cut and fangs making the two of them different. Different from her sister, she's a punk Tomboy who roams about the world, killing and stealing. Also, she is a shapeshifter, able to turn herself into a giant wolf-like creature. In recent manga, she's shown to have a soft spot for Amatsuka, so...
• In Fushigi Yuugi, Suboshi and Amiboshi's society believed that both halves of a set of twin boys were evil, and so they were treated with disdain by most of their society. (And the only people that didn't buy into that nonsense, namely their parents, died.) This led to their being manipulated into accepting their roles as Seiryuu Seishi.
• Evil robotic Angels appeared in Galaxy Angel Moonlit Lovers, after an evil robot Tact appeared in the first game. Strangely, the fake Angels were the only villains to be kept in the Galaxy Angel anime, and they only appeared for one episode.
• In Girls Bravo (only in the manga) Fukuyama has one on the parallel dimension of Seiren.
• Subverted in Higurashi: When They Cry: it's often impossible even for people who have watched the series more than once to tell whether Shion or Mion is the evil twin. This makes them both seem evil, or at least sinister. Shion is the one out of the two that does all the killing (outside of Higurashi Gou at least) while forcing her sister to listen, however this is later double subverted as neither of them are actually evil. Shion is overprotective of her friends to the point of being Yandere and is prone to the Hate Plague, but for the most part she's quite sweet and docile.
• The Legend of Zelda: Four Swords (2004)
  • Shadow Link is an evil version of the original Link who fights him and his clones throughout the story. In the end, though, he pulls a Heel–Face Turn.
  • It's downplayed with Blue and Vio, who are functionally Jerkass Twins. Although on the side of good, they are pettier and smugger than either the original Link or Red, and both need a bite of humble pie before they're truly on the level.
• Yuuna's evil twin in Maburaho is magic-derived.
• Magic Knight Rayearth's second season has Nova, evil twin to titular protagonist Hikaru Shidou. Extremely bi-polar (which is putting it kindly as she switches constantly back and forth between cutesy, loving little child and homicidal psychopath personalities), and bat-shit insane. Created at the very instant that Hikaru and her fellow Knights were transported back to earth at the end of the first story, Nova is actually a small portion of Hikaru's soul given a separate existence and consciousness of its own. Hikaru couldn't cope with all the crushing negative emotions and thoughts brought on by the trauma induced by the first story's ending, and thus her body expelled them all along with a bit of her being, which was given a life of its own via Cefiro's "willpower=reality" system of existence. In the end she accepts her restrained feelings and confronts Nova, which leads them to become one person again.
• In the manga adaptation to Mobile Fighter G Gundam, we're introduced to the Shading Gundam, an ebon-colored Shining Gundam controlled by an AI. The plan was to have the Mobile Fighter defeat Domon and force him to become its "pilot" (he'd be stuck in it — the AI would do all the fighting) after he ended up nailing four draws in a row. Domon ended up defeating the unit by unleashing his Super Mode on it.
• Mobile Suit Gundam SEED featured Rau Le Creuset, an unstable clone of secondary character Mu La Flaga's father. While they initially don't seem similar, when Rau removes his mask, he reveals his identical face. Rau's feelings that his existence was an abomination and nihilism about humanity in general led him to attempt to wipe out all of humanity, Coordinator and Natural both. Considering that he got his last name from the french word of The Crucible...Yeah, he's a very screwed up guy.
• Monster has the titular Johan Liebert, Half Identical Twin of Anna Liebert (Nina Fortner).
• In Nekketsu Saikyo Gosaurer, the Kikaika Empire brought forth Dark King Gosaurer, made to deal with King Gosaurer, and its individual components are much stronger than King Gosaurer's. Also Would Hurt a Child because the damages it can do to King Gosaurer can hurt the classmates inside it! Also, unlike King Gosaurer, it only has one pilot.
• In Ninja Nonsense, Onsokumaru creates an evil duplicate when he attempts to use a Ninja Clone technique. Of course, Onsokumaru being Onsokumaru, the twin isn't really any worse than the original.
• One Piece introduces a an evil set of not twins, but fraternal quadruplets. Vinsmokes Ichiji, Niji, and Yonji, the older and younger brothers of Sanji of the Straw Hat Pirates, respectively, are nothing like him — while they do share his cool head, his perverted tendencies, and his temper, they have none of his compassion and care for no one but themselves. As children, they viciously bullied Sanji for continuously displaying compassion and for being a weak waste of space, something that their father, Judge, condoned. It's later revealed that all of the Vinsmoke quadruplets, including Sanji, were physically and psychologically altered by Judge in utero in an attempt to turn them into the perfect Super Soldiers, but their mother, Sora, secretly intervened by taking a drug that reversed gene-altering surgeries so she can protect their humanity. Only Sanji was successfully saved, while his brothers only have but a tiny shred of humanity left. They can't understand why Sanji continues to act kind to others, because they were programmed that way.
• Hana from Papillion Hana To Cho is glamorous, popular, and the decided favorite over her Country Mouse twin sister Ageha until Ageha discovered a tiny bit of confidence after reuniting with an old (male) friend. Hana then steals said friend by using Ageha's weak stomach to get her out of the way with a little Hidden Depths sweettalk. Things get worse after Ageha gets over the guy, improves her relationship with her Well Done Daughter Mom and hooks up with another guy: Hana disguises herself as Ageha while Ageha is sick and is so irritating that he breaks up with Ageha the next day. Due to said guy being her school counselor and off-limits in the first place, it's unlikely Ageha will ever know the real reason they broke up.
• Ranma from Ranma ½ gets a mischievous copy of his female self from a Magic Mirror, who is incapable of gender-bending and happy to learn that Ranma is a guy. They almost manage to seal the copy in another magic mirror, but instead a second copy of Ranma is created, this one male. The two copies then hook up, which at least keeps them out of trouble.
• Saint Seiya has Gemini Saga and Gemini/Sea Dragon Kanon, each of them is the evil twin to the other in different parts of the story. The Black Saints not only shares the same armor as the protagonists except theirs is black but for unexplained reasons also share the exact same physical appearance as their good counterparts. This is all the most jarring in the case of the Black Phoenix mooks that come in mass and all look exactly the same, that is to say like the main Phoenix. All the attacks of the evil counterparts also are reminiscent of the good ones albeit more evil. For example the attack of Black Pegasus, Ankoku Ryu Sei Ken, is similar to the Ryu Sei Ken of the main Pegasus except it slowly contaminates its victims eventually making them suffocate to death. Likewise, the Black Andromeda's attack has its chains turning into snakes feeding on the victim's blood.
  • In Saint Seiya: The Lost Canvas, Gemini Aspros to Gemini Defteros. Slightly Subverted in that Defteros is introduced as a "demon", and, when younger, was believed to carry ill omen with him by the Sanctuary inhabitants, but it was actually his brother who turned out to be the evil one.
  • This is a staple in Saint Seiya franchise , save for Saint Seiya: Next Dimension as In-Universe, it is believed that each pair of Gemini Saint is born cursed, one is evil and one is good, and they will fight each other until the other dies. In Saint Seiya OmegaGemini Paradox is this to her sister Integra, who decided to accept her fate as the "evil" Gemini Saint. Integra in contrast flat-out defies that fate and claims if that is the fate the stars set up for them, she will destroy the stars itself.
• Saiyuki: Evil twins of the Sanzo-ikkou were created by a demon who rationalized that the best chance of beating them was pitting them against themselves. This promptly turns into comedy when Hakkai, Gojyo, and Goku realize that they have a chance to beat up on a Sanzo-lookalike. Also used as An Aesop, as when they win against their clones — who are wearing their clothes from the first season — they explain to the confused demon that they are not the same people as they were when the clones were created and they grow and learn as blah blah blah.
• Sailor Moon: Zoisite ends up transforming into a copy of Sailor Moon to lure Tuxedo Mask out.
• Shaman King: Big Bad Hao/Zeke Asakura is Yoh's evil twin who hates and wants to destroy humanity.
• The third Sgt. Frog movie featured a "Dark Keroro" generated by some lost alien technology.
• Subverted in a stand-alone episode of Slayers. A villain uses an enchanted mirror to create dark duplicates of his victims, including main characters Lina and Naga. The clones are supposed to be the "reverse" of the originals — which, to the bad guy's surprise, means the copies are meek, modest and peaceful, not evil.
• Takaya from Tekkaman Blade quite literally has an evil twin. His twin brother Shinya succesfully completed the Tekkaman conversion process, becoming Tekkaman Evil and the main villain's dragon. At one point, he gets in close to Space Knight HQ in order to launch a surprise attack by dressing up as his brother and playing on his celebrity status amongst the human troops.
• Near the end of the Tiger Mask manga, Tiger's Cave last fighter is a very convincing fake Tiger Mask, pretty much identical to him in build, weight, fighting style (Justified as they were both trained by Tiger's Cave), and even voice (Tiger Mask himself was surprised when he heard his voice, and couldn't tell the difference). Aside for the fact Tiger Mask had started fighting cleanly, the only visible difference was that the real Tiger Mask had plastic fangs on his mask and the imposter's had steel ones. That's how the promoter of their match can tell the difference after Tiger Mask loses the armband he wore for the occasion and gets pissed enough to revert to his Tiger's Cave training.
• Knives in Trigun, Cain in Trinity Blood, and Aion in Chrono Crusade. Apparently, being a guy who's the hero's evil twin means being a genocidal psycho and having a brother complex the size of the Empire State Building. Knives, Cain and Aion are anime's unholy trinity of Evil Twins. The three of them are practically expies of whomever came first. Roshel/Rociel in Angel Sanctuary is very much like them too, with the difference that Alexiel is female and his non-identical twin. Also a partial subversion in that Rociel is a supreme angel and Alexiel, a fallen one.
• Throughout Tsubasa -RESERVoir CHRoNiCLE-, there are sinister flashes of another Syaoran floating in a tank of water in the villain's base, who seems to be "influencing" the Syaoran who is traveling with the good guys. In the manga, the truth is revealed. The Syaoran in the tank is the "original" Syaoran, and the one traveling with them is really a heartless clone whose emotions were inspired by psychic connection. Upon the good Syaoran's release, our Evil Twin Syaoran succumbs to his programming.
• Vampire Game plays around with this trope. In the kingdom of Razenia, twins are considered bad luck, and so when twins are born, one of them is chosen as "evil" and is abandoned. In this case, the "good" twin is the crown prince... and the "bad" twin turns out to be Vord, one of the nicest characters in the series.
• Zero's evil twin Ichiru in Vampire Knight.
• Jaguara and Hamona in Wolf's Rain, two Nobles who are twins. Jaguara, the older twin, is ruthless and cruel, and is generally merciless towards the wolves, while Hamona, the younger twin, is gentle and caring, acting as a Living Emotional Crutch to her lover Darcia. Jaguara murdered her sister because she grew jealous of Hamona, as Jaguara loved Darcia too, but it was Hamona he actually loved.
• Yu-Gi-Oh! ARC-V: Yuya, Yuto, Yugo and Yuri were all originally one person, Zarc. After being seperated into four entities across four new dimensions, Yuri is the only who grew up as an evil person. The environment and circumstances around his education turned him into a Psycho for Hire, a Blood Knight and Omnicidal Maniac, added with the heavy implication that Zarc's darkness inside him and Starve Venom Fusion Dragon had the greatest influence on them than on the others.
• Zeon from Zatch Bell!, Evil Twin to the title character. Angry at not being able to have a Dangerous Forbidden Technique, which was given to his Idiot Hero of a brother. Has a Redemption Equals Death moment.