>>716087275
Chase and Leo are both objectively shitty people. That phone prank he pulled on Leo is actually irredeemable never mind the fact the later reveal that he was still in contact with Leo while he was away so Leo couldn't even move on.
The game pretty hints several times and doesn't directly say he's schizophrenic and on meds (the possession and town influence most likely contribute to that diagnosis) but even then current possessed chase has been the "real" Chase longer then unpossessed Chase.