Arich by Mike Mignola

Arioch, Lord of the Seven Darks, Knight of the Swords, Lord of the Higher Hell, et cetera, is one of the most powerful Dukes of Hell.

Arioch is the patron of Melniboné and has a personal relationship with Elric, who was the first emperor to summon him to the plane of Earth in a long time. He is sophisticated and highly intelligent, though possibly insane, and he usually (but certainly not always) appears in as an amazingly beautiful youth, usually with blonde hair.

Arioch is one of the three Sword Rulers along with Xiombarg and Mabelode.

Lord Jagged, a Denizen of the End of Time, once took the form of Arioch to manipulate Elric. It is implied that Jagged and Arioch may be one in the same.