[ his entire life being fiction makes it really hard to properly gauge this stuff, actually. ]
Mostly...? When they summoned us there, each of us had our soul partially fused or something with a monster's in the process. And normally they were pretty much dormant, but if they got activated — which I think happened because of some ritual shit the cult was doing — then they'd make you kill people and force you to keep quiet about it.
...At least until they felt too ganged-up on and snapped and went way deeper into monster mode.
Yeah. There was also this thing that happened sometimes where they'd summon a chimera of two different monsters, and then the people with both of those monsters would get possessed and work together.
That was... the more unique part of it, it sounds like. So I feel like if they're going to use our situation for a premise at some point, they'll probably use the worst variation of it and go for that.
Yeah, I figure there are some cases where it's just like, a straight-up one-to-one thing where whoever or whatever is doing the possessing completely replaces the personality of the host.
[ like when maya channels people, though he has no idea that's actually a thing! anyway i feel like this must have happened at some point in his old 60s/80s anime in a stupid way ]
But it does seem like just influencing rather than overwriting is more common as far as these things go.
It's nicer to have something to blame besides yourself. And given that we know people in these situations just go somewhere else to deal with the aftermath alone...