I was actually, serious, you can try to be funny all, but No Jill being an antagonist is one of my oldest theory.
they look awfully similar to each others, they could even pass as twins if not the age gap. Hell if Jill start to wear Lana's clothes, ( I mean her own clothes ) it will be all revealed, and every pices will be fall in to it place.
and since the chick mc is the biggest shity person in the game, its only make sense that the main chick girl , also gonna be the biggest piece of shit too.
of course now that we figured out, dpc will try to come out diversion tactic to keep his story secret, until the very end.