what if I was combined with another person theme

We are made to imagine the hypothetical scenario that two people are somehow combine into one, typically receiving physical and mental traits from both progenitors and having the memories of both.

9 total · 2 choice · 5 major · 2 minor

StoryLevelMotivation
movie: Possessor (2020) choice Tasya's consciousness became trapped in Colin's body and they started to mesh together into one discombobulated person.
voy2x24 choice Tuvok and Neelix into Tuvix
movie: Donovan's Brain (1953) major The mind in William H. Donovan's disembodied brain partially transferred itself into the brain of Patrick Cory.
movie: Hauser's Memory (1970) major Hillel became combined with the Hauser.
movie: Man with the Screaming Brain (2005) major Antics ensued when William had to share his body with the cab driver Yegor, after being transplanted with a piece of Yegor's brain.
movie: The Lady and the Monster (1944) major The mind in William H. Donovan's disembodied brain partially transferred itself into the brains of Patrick Cory and Franz Mueller.
rd1988e6x02 major The titular Legion character was composed from the combined minds of each member of the crew.
movie: Ghost in the Shell (1995) minor Major Kusanagi and the Project 2501 intelligence combined themselves into a single, new entity which had aspects of both their personalities.
movie: The Final Programme (1973) minor The story concluded with David being combined together with Miss Brunner into and vaguely ape-like hermaphroditic being.