Little Star Chapter 4
Luna nodded and waited to hear how her daughter got stuck with a split personality and how she only barely aged since that night. twilight should have been more like luna in her second form or her sister's than an average pony.
Light and Dark Ch.2: The Feud
When you begin to lose control of your transformations for any number of reasons, number 1 being intense stress, your soul will fracture and inflame or in modern terms, develop split-personality disorder with both of your forms developing differently.
Pokemon: QATM Chapter 1
It was almost comical how the man switched from cowardly to snobbish like some sort of split personality...
Shifted Chapter 1
What if it had all been a split personality? or perhaps it was not jill that was the split, but jack? what if she had finally become aware of some crazy glitch in her brain that had been ticking away. jack and jill went up the hill...
psychiatrist lessons
Fox felt uncomfortable as he listened "look all his negative feelings had to go somewhere and they formed something extremely twisted, it's not a split personality, nor is it a demon, it's something far worse.
New Experiences: Rebirth
Gatomon said, "besides not having a psycho split personality. i share a son with him too. our love has been torn and scattered between to many different events. most of them where on my hands but he wasn't perfect either.
Springtide of the Black Rose: Chapter 13: Black Holiday
Barrette felt out of place in this case, "wait, is this that one girl that had a split personality?"
Twilight of the Gods (Chapter 15, Book7)
It would be akin to a temporary split-personality disorder. there's no danger. then we could hunt down someone either willing to volunteer, or someone who doesn't want to live - someone willing to abandon their body so to speak."
Let Slip the Hounds of War
Because of that split personality, most humans treat those with the blood lust like vampires. they will run in fear, or beat them for no reason just because they are afraid of what the beast could do.
Walls Book 1 - Ch 18 : Phoenix
"vilkas volkov, split personality, budding insanity, bargaining with the self," i mused. volkov smiled and made a slight chuckle, "i know." "should we go to athena? i don't think this is normal." volkov glanced away, "no... we shouldn't." "why not?"
CH2 Victim of Mare
The constant overreactions to stressful situations and seemingly split personality that came with that proved to be more than enough to confirm his disturbed mind.
Origins: Conclusion
Evan shook his head and answered "i left because i developed a split personality who was extremely hostile. i was already corrupted from anger, hatred, sadness, emotional pain.