I was starting to wonder if he's just playing dumb . . . but the stats make me question it...

I think the brother she knows is actually a soul who possessed the boy so his true personality has always been hidden from her

I mean, that's a given, right? Since it says he was corrupted after all the times dying and needing to try over and over again iirc . . . but I still don't trust it (￣∇￣")