[@DepressedSoviet] that's fine. With your Demon memoryless, you'll have next to no Faith or demon powers though. You can surpass the usual caps for mortals obviously, and you can keep one point of faith so all your passive abilities will work. You won't really have much torment either. 


That said.... Your character would likely have been glued to the TV during the battle of L.A. seeing the full glory of the Morning Star would effect both the human and demon psyche in powerful ways, its not likely he would still be without his memory after that. What you may want to do is build your human traits high (especially your influences) then give basic demon starting abilities. Faith will be easy to come by now. Would also make for interesting roleplay as the human psyche would be able to still be present as the demon wakes back up. Also puts you in direct line for my sub plot which involves the human and demon psyche working together.