For some reason I'm reminded of a couple twists.
1. It turns out we (the player) were a possessor and not the character themselves. This is actually surprisingly common. Or that's how it looks to me.
2. Our character was a fake identity the whole time. Well, okay that was only a twist once from what I can recall. Technically it has been used more but not as a twist... for the audience anyway.
I actually kind of like these. Except for cases of 1 where the character hates you.