Gizbo

Gizbo or Grizbo or Gizbor or Stank Boy any other variation you'd like (it's not consistent as they do not actually have a real name, just one they make up) is a devil.

The Stank Bitches encountered Gizbo in the Nine Hells when attempting to rescue Mississippi. They fought and after Gizbo was defeated, they were forced to agree to a contract to aid the Stank Bitches and not return to the material plane for at least 1000 years.

At least 1000 years later, Gizbo returned to the material plane with Cocytus to invade the moon.