That is strange, but it might fit their profile. They're used to possessing people and driving them towards suicide- maybe murder, if they can't do anything otherwise. When they attacked me, they still had all their abilities, so they'd taken on the form of a monster from my head.

If it's just them, it probably doesn't 'feel right'. But...honestly, hell if I know. I tried to sort out their motivations, and kept just getting that it was their 'purpose'. It's like they don't have a personality at all. At least you and me have a reason to get violent.