Alastor, also known as The Radio Demon, is a sinner demon and one of the many powerful Overlords of Hell.

He is the wickedly charismatic demon who has offered to assist Charlie Morningstar in her endeavors, albeit, for his own amusement.

Alastor is a slim, dapper sinner demon with beige-colored skin, and usually has a broad smile full of sharp, yellow teeth. He is at around the same height as his rival, Vox, with the two standing at approximately 7 feet and is very hard to get him angry.