Amnesiac Psychic with Abomination Discipline. He won't even remember his name, but chooses John Deaux from one of the many tattoos on his body. It would require a bit of work with the GM (My wife...so easy enough), but in certain situations the tattoos actually turn out to be freaky foreshadowing clues. When the Dark Half manifests he chides the rest of the group and makes it appear he knows the answers to the lost memories, but refuses to share. (Likely a lie to torment people.)
Second idea is the same as the one above, but change the discipline to Rebirth and be someone who remembers more about his past lives than his current one.
