Dirachiel.
Dirachiel, known as the Demon Angel, a former Fallen Angel turned Demon and one of the seven Electors of Hell, demons that can choose if a lower-class demon is worthy to become a infernal noble.
He is also one of the twenty-eight demonic rulers of the lunar mansions, having dominion over the mansion Athanna (also known as Alchaya the "little star of great light").