He's evil, but doesn't bother with trying to hunt other humans. He's only interested in going after beings stronger than himself. Hence, anybody with less power than Suliss has nothing to fear from him unless they get between him and a more powerful body.

When he isn't body hunting and he has no leads on a new form, he just sort of... Mills around like a wind up toy, having literally nothing to do or aim for aside from fulfilling the functions required to live.

Yeah, he could also have amnesia from sleeping in a corpse for so long.