But the thing is, no one is purely evil just for the sake of it, everyone have motives and reasons to why they do what they do, going with the “because they just evil” is not very high writting to me.
And with the Man’ari and actually all of the demons, since Tbc it was explained tha they are not just pure evil and that some have actual reasons etc, the thing is, yes their nature is to corrupt the very place they are in, and they must feed upon life energies to sustains themselves, but this dont mean they are just “pure evil” its just like anyone needing to feed upon a source to survive and their abilities to quesiton this or not.