User blog comment:SAmaster/Mamano Fan Creation - On the Order of Angels/@comment-24768935-20140429160624/@comment-24851346-20140429182555

I imaigne that Angels only need Spirit Energy due to the interference of Succubi. Before that, they would not have been considered Monsters. Logically, they would have needed something else to survive. So, I figure they can subsist on Prayer, and Good Deeds, at least ones consistant within the churchs doctine. I'll post some extra information about Angels later.