It must fall under horror, mystery, thriller, etc. Some romance is good too. I watched Hellsing, Death Note, can't remember the rest. The religious theme could be real or made up, and I'm pretty open to different things.
Please don't include "exorcism mangas".
Thanks. ^_^
D. Gray-man. there is a power called Innocence that is granted by god to help kill akuma which are souls that have been trapped into a machine-like being by the Millenium Earl. there are also Noah that are enemies (as in Noah's arc)
*note* even thought hey are called exorcists they don't exorcise, they just kill with their power/weapons Sounds perfect for you. they also dont preach the religion it just used to set the story