* CrouchingMoronHiddenBadass
* DemonicPossession
* EnemyWithin
** EnemyWithout
** SuperpoweredEvilSide
* EvilFeelsGood
* EvilTwin
* GollumMadeMeDoIt
* TheHeartless
* IdentityAmnesia
* JekyllAndHyde
* LiteralSplitPersonality
* NotHimself
* PowersViaPossession
* ShadowArchetype
* SplitAtBirth
* SplitPersonality
* SplitPersonalityMerge
* SplitPersonalityTakeover
* TalkingToThemself
* TwoSoulsOneVessel
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<<|{{Tropes}}|>>