This has been bugging me, but its a good time to bring it up. The title is called Rise of the demon king.. But from what I have seen, hes no demon, hes human.. So that means, his divine spirit will be a demon ? Thus he gets called demon king. Or rise of the one, so to say. It makes zero sense to be called a demon king if he aint no demon. But a little if he commands demons. So his divine spirit as to be a demon in this regard.