History Main / SplitPersonalityTakeOver

* This is why Moka never takes off the rosary herself in ''Manga/RosarioToVampire'': the outer Moka would be replaced by the inner Moka forever. [[spoiler:This doesn't stop her from trying it anyway.]]

* ''Toys/{{Bionicle}}'': In one of the alternate universes Takanuva stumbles through, the alternate [[BigBad Makuta Teridax]] absorbs Matoro, who failed in his mission to save Mata Nui in this universe. When Makuta absorb other beings, they normally absorb their bodies and minds, but Matoro fights back, killing himself and Teridax, becoming the hero he was destined to be.

* After numerous months languishing in absence and bad booking, Wrestling/BrayWyatt returned to TV as a DepravedKidsShowHost version of himself - cardigan and all - hosting the ''Firefly Fun House''. As each episode progressed, it became clear that this version of Wyatt was ''even more'' unhinged than his ''"Eater Of Worlds"'' persona until, finally, he debuted his new gimmick; a silent, demonic facet of Bray's personality known only as [[https://www.youtube.com/watch?v=LUuaqKuMmrY "The Fiend"]].[[/folder]]

%%* Michael Moran does this to himself in Creator/AlanMoore's run of ''{{Comicbook/Miracleman}}''.

* {{Inverted|Trope}}, to some extent, with [[Comicbook/IncredibleHulk the Hulk's]] son Skaar, where the weaker, more vulnerable personality ('puny' Skaar) has recently managed to escape Skaar's suppression of him in their shared mind.

* During the ''Comicbook/SpiderMan'' storyline ''The Gauntlet'', [[spoiler: Curt Connors']] worst fears are realized when [[spoiler: he loses a battle of wills with the Lizard part of his psyche]]. [[spoiler: The Lizard kills and ''eats'' Curt's ''son'' Billy, and "Curt" essentially dies due to the trauma, leaving only The Lizard]]. A later story reverses this: [[spoiler: Spider-Man manages to bring Curt's body back, but doesn't realise it's still the Lizard's mind. Then the Lizard reverts to his usual form, but ''this'' restores Curt's mind. Curt keeps this quiet because he feels he ''deserves'' to be locked up]].
* This was Bloody Mary[=/=]ComicBook/{{Typhoid Mary|MarvelComics}}'s (a villainess most often found in ''Comicbook/{{Daredevil}}'') entire schtick. She had rather impressive psychic and telekinetic powers, but she also had a horrible case of multiple personality disorder; namely, at least nine of them. Two of them (the aforementioned Bloody/Typhoid Marys) tended to take over more often than not, and there have been at least two instances where one or both have "permanently" taken over only for later events to unlock her original (non-powered) personality once more.

* In ''FanFic/WeightOfTheWorld'' [[spoiler: after Remnant nation-tans are reborn and reach a certain age, they’ll remember who they really are and their nation memories and personality will take over, erasing the human personality they had before that point. According to Word of God, if the human identity is different enough, ''at most'' the nation-tan will get two Semblances for that life. Other than that, the original human personality is completely gone, as confirmed by Neo/Mistral in the sequel ''The Shattered Soul'']].
* In "Two For One" of the ''WesternAnimation/DannyPhantom'' ''FanFic/FacingTheFutureSeries'', [[spoiler:Danny ends up inside his psyche where he encounters his ghost half, which actually has a consciousness of its own, and, tired of Danny treating him like a burden, attempted to take over his body. Fortunately, Danny managed to convince his ghost half that he needed his humanity, otherwise, he'd end up as Dark Danny. This resulted in the pair doing a SplitPersonalityMerge which allowed Danny to get control of his True Ghost Form]].

* ''Series/{{Warehouse 13}}'': "[[WhamEpisode The Ones You Love]]" reveals that [[spoiler: the "Brother Adrian" that Artie's been dealing with all season is a hallucinatory manifestation of an increasingly powerful EnemyWithin. Just as Artie realizes this, it grows powerful enough to assume control completely]].

* The Harrowed from TabletopGame/{{Deadlands}} are constantly in danger of this, since they owe their very existence to the demons possessing them. Except [[TheDragon Stone]]. He's already such an evil, cruel, monstrous asshole that [[HorrifyingTheHorror his Manitou just hides in the back of his head and tries not to call attention to itself]].

* The bad ending of ''[[{{Manhunt}} Manhunt 2]]''- achieved by killing people as gruesomely as you can - has [[spoiler: Leo killing off Daniel's personality and becoming the sole resident of his body]].
* Near the end of ''VideoGame/{{Planescape Torment}}'' you get trapped in a place where you encounter three of your previous "incarnations". One wants to take you over so and another simply wants to destroy you. If you manage to forcibly take over the other two or get them to merge with you, you will gain their memories (and a ton of XP). If you fail, you have to destroy them and their memories are lost forever. The third takes no convincing to get him to merge with you and is more than happy to.

* In ''VisualNovel/UminekoWhenTheyCry'', the little [[MsImagination Maria Ushiromiya]] always tries to convince herself that every time [[StrugglingSingleMother her mother]] [[TroubledAbuser Rosa]] starts to get very violently angry with her it is because a [[SplitPersonality Black Witch]] possesses her and taking her place in order not to accept that her mother, whom she conceives as lovingly kind and altruistic, she may actually be [[AbusiveMom very abusive]] and even [[ParentalNeglect negligent]] towards her by her own nature.

[[folder:Web Comics]]

* At the end of ''Film/{{Psycho}}'', it is revealed that Norman Bates developed a dissociative identity disorder after he murdered his jealous and abusive mother ten years ago. Unable to cope with his guilt about the crime, he recreated his mother in his own mind as an alternate personality, which took over in moments of emotional distress and caused him to kill any woman he felt attracted to. The final scene shows Norman in a jail cell while an internal monologue in his mother's voice can be heard, showing that the dominant "mother" personality now has complete control over his body.

* More of a Split-Personality Removal, but in ''WesternAnimation/TheLEGOMovie'', there's Bad Cop, who shares a body with Good Cop, whose face is on the other side of their head. [[spoiler:When Bad Cop refuses to test [[DoomsdayDevice the Kragle]] on his own parents, Lord Business decides that Good Cop has made him weak and removes Good Cop's face with nail polish remover and a cotton swab. However, Good Cop's influence isn't completely gone, as after Bad Cop's HeelFaceTurn, he attempts to draw a new Good Cop face on the other side of his head.]]

* In the remake ''Film/TheFly1986'' Scientist Seth Brundle slowly transforms into a pathetic and diseased human-fly hybrid after accidentally fusing with said-insect in a teleporting experiment. At first, the deformities were purely physical, as his human flesh warped and decayed into a "cocoon" under which the monster grew. Sadly, he also transformed on a mental level into an instinct based animal, unbound by compassion and morality. The love of Veronica, our heroine, was sadly not enough to stop his predictions from coming true...

* ''Series/KamenRiderOOO'' supporting character Ankh has been reduced to a disembodied arm at the start of the show, with no knowledge of what happened to the rest of his body. The body is eventually revealed to have come back to life without his mind in it and developed its own childlike personality, referred to in external material as Lost Ankh. Both attempt to consume each other once they meet, with Lost Ankh proving the stronger and eventually winning out after several skirmishes. Eiji's eventually able to kill Lost Ankh, and the original Ankh resurrects from his remains.

%%* A horribly tragic case occurred to Dan Turpin during ''ComicBook/FinalCrisis''. To be fair it skirts between this and DemonicPossession, but after visiting Bludhaven in search for missing children, Danny starts getting blackouts and finds he can't control himself after a certain point. He then discovers with horror that he is being '''possessed and/or erased''' by [[AGodAmI Darkseid]]. After he is completely possessed, he is poisoned by Batman, nearly killed by the Black Racer, and finally and utterly destroyed by Superman.

In ''Webcomic/TheOrderOfTheStick'' [[spoiler: [[http://www.giantitp.com/comics/oots1130.html Durkon does this to the evil vampiric version of himself]]. Specifically, he tricks the vampire into absorbing all of Durkon's lifetime of experiences that went into making him who he is. Since the vampire has had no equivalent lifetime of experiences himself, this turns him into a duplicate of Durkon himself]]. This is an unusual case, as [[spoiler:Durkon was definitely the "weaker" personality in terms of power; in fact he had no control over the body at all]].

* At the end of ''Film/{{Psycho}}'', it is revealed that Norman Bates developed a dissociative identity disorder after he murdered his jealous and abusive mother ten years ago. Unable to cope with the guilt of his crime, he recreated his mother in his own mind as an alternate personality, which took over in moments of emotional distress and caused him to kill any woman he felt attracted to. The final scene shows Norman in a jail cell while an internal monologue in his mother's voice can be heard, showing that the dominant "mother" personality is now completely in control of his body.

%%* ''Film/{{Psycho}}''. "Why, she wouldn't even harm a fly..."

* Averted in ''VideoGame/AmericanMcGeesAlice''. Alice's BattleInTheCenterOfTheMind with The Red Queen would have determined which of her personalities would be dominant and which would be cast down and forgotten.

* This forms part of the basis for the main plot of ''VideoGame/Cyberpunk2077''. The main character, V, is hired to steal a chip that contains the digitized personality of rockerboy terrorist Johnny Silverhand, who died 50 years prior to the game's beginning. After circumstances force V to install the chip in their own head, they are then [[BoomHeadshot shot in the head]], and the chip saves their life by repairing the damage. Unfortunately, it also begins the process of overwriting V's brain with Silverhand's personality, a process which will ultimately result in Silverhand becoming the dominant personality in V's head. The rest of the game is spent trying to discover a way to undo this. [[spoiler:One of the game's endings has V willingly relinquish control of their body to Silverhand, giving him a second chance at life]].

If the takeover is incomplete, expect to see signs that the original is FightingFromTheInside. Antonym to SplitPersonalityMerge. When this is induced by outside brainwashing, it may be BrainwashingForTheGreaterGood.

** Discord originally entered the mortal world [[AmnesiacDissonance as an innocent version of himself named Dissy]] who had none of his evil self's memories. Sadly, Discord's original persona still existed and eventually began to awake until it finally devoured Dissy and began his thousand-year reign. It's mentioned in-universe this happening was unique to Discord, as most deities instead have a SplitPersonalityMerge in situations such as this. [[spoiler:However, later it turns out Dissy still exists and begins to resurface during the Rumors Arc to aid the heroes.]]

* Although better remembered as the first of the SweepsWeekLesbianKiss episodes, ''Series/LALaw'' episode "He's a crowd" features a man named Gregory on trial for murdering his girlfriend. His lawyer initially tries to pin it on a violent alter called Sean but upon being provoked a hitherto unknown personality called Camille Green emerges. She confesses to murdering the girlfriend (and also Gregory's father years earlier) before putting Gregory and Sean "to sleep" and becoming the dominant personality.

* An episode of the dramatized court-case anthology series ''The Judge'' dealt with a female [[SplitPersonality dissociative identity disorder]] patient who, in the episode's surprise twist, turned out to be the victim of her psychiatrist, who was having an affair with her FemmeFatale persona and plotting to destroy her original personality so the two of them could be together. While the script might've involved some dramatic exaggeration, there are real-life cases of secondary personalities in DID cases plotting -- or at least wishing -- to kill their primary selves, without recognizing that if they're successful, they'll die too.

* In [[UsefulNotes/TheGoldenAgeOfComicBooks Golden Age]] Creator/DCComics, Priscilla Rich's jealousy and envy of Franchise/WonderWoman caused her to spawn a second personality. As the ComicBook/{{Cheetah}}, she became a recurrent foe in the ''ComicBook/SensationComics'' and ''Wonder Woman'' series.

* The FateWorseThanDeath of Olivia from ''Literature/HiveMind''. As a telepath, she had to deal with the people she read sticking in her mind. Most telepaths eventually figure out how to clear these "echo personalities" out, but she never did, so she ended up drowning under them; by the time she appears in the story, the original Olivia is essentially gone. [[spoiler:One of her new personalities has fully taken over and started a terrorist cell, hoping that the treatment once she/Olivia is found out will let her fully eject the original Olivia and other echos and be the only personality.]]

* This happened to ComicBook/ProfessorX in ''ComicBook/{{Onslaught}}'' as the title villain is Xavier's dark side merged with the basest parts of ComicBook/{{Magneto}}'s run amok.

In Umineko the little [[MsImagination Maria Ushiromiya]] always tries to convince herself that every time [[StrugglingSingleMother her mother]] [[TroubledAbuser Rosa]] starts to get very violently angry with her it is because a [[SplitPersonality Black Witch]] possesses her and taking her place in order not to accept that her mother, whom she conceives as lovingly kind and altruistic, she may actually be [[AbusiveMom very abusive]] and even [[ParentalNeglect negligent]] towards her by her own nature.