(Y/N) Gremory 1/3 human 1/3 devil 1/3 divine born from a demi-god and a devil the brother of Rias and the current Lucifer. Neglected and Abused by his parents and sisters along with never knowing his mother he finds his only comfort in books. When he turns thirteen he runs away from his family, he is later found by Azazel where he learns he is the decedent by Gilgamesh. Will he forgive his family or show them the true power of the gate of Babylon.