I think he's some sorta demonish entity tha feeds on da souls of people, mostly young kids. He latches onto a person when he gets "hungry", and induces Slender Sickness to start preparing the soul and mind for removal. Then, when he kills da person, eats the soul, and sates his "hunger", there's not use for the body, so Slendy does somethin' to it because he's bored probably and wants somethin' to do. Just ma ideas, don't agree if you don' agree, but tell me what you think!Â