He lost the battles againts The Knokker that attack his village so The Beholder curse him into a vampire,You can call him Fushi or Joan,since Joan is the name The Nameless Boy give to Fushi when he is still in wolf form,then turn into a human when The Nameless Boy is died,but now turn into a vampire cause he lost his battle againts The Knokker that want to take his form of his appearance