Well all I know about World of Darkness I learned from VtM: Bloodlines so if he's a vampire he's a Malkavian with Dr. Jekyll and Mr. Hyde style duality where one personality is pretty much normal Ienzo but a bit more shrinking violet and the other is full on stern terrifying mad scientist.

I mean usually he's a werewolf in supernatural creature AUs but I don't know enough about WoD werewolves to say anything on that front.