WAIT WHO IS ABERTTIA?!!!

The demon guy that the princess fought before she reincarnated

Yeah, the one she sealed because she couldn't defeat him and when she was forced to rebirth the seal came undone. Since he has every carnal sin he wants her in every way because he lusts for her, envious of her, wants to possess her, hungers for her, most of all wants to kill her. He's an odd ball demon, but practically harmless for now.