I do like violence and being evil. I might be joining this. Hm, maybe a evil spirit/witch or some kinda boogen?
And they'd have spirits of the people they've killed bound as eternal slaves. Or rather for as long as their interest holds. They'd have human vegetables stocked like outfits. Possessing a person for an extended period or multiple times tends to degrade their mental and physical health until there's nothing left but a meat suit. Fortunately, there'd be memories and skills each suit carries, making them a little better than aesthetic things. And any meat suit is useful when it comes to casting blood magic. They've all got what is most necessary in that regard, though virgins are much more prized.
Welp, I quickly got into that.