Did you really think I'd post something this spoilery in this thread at this time?
In all seriousness, though, the Castle Master will remain deceased in Lunar Shadow X (except maybe as an illusion or a ghost), though he never dies in Lunar Shadow Zero (even if he is the final boss).
He is also pure human, rather than vampire.
Though, I guess that one can present an analogy with what is known at the moment.