I think iit's a little too easy even in normal and hard... And the third stage boss I think she was a Zombie because her position is a zombie position...
Taking into account both the outstretched arms and what looks like a charm pasted to her forehead, I'd agree with the undead route. No idea what the second one is supposed to be though.
Youmu "Myon" Konpaku avatar by Prime32, avatar creator extraordinaire!