Baalzebul

Baalzebul is the lord of Maladomini, the seventh layer of the Nine Hells, and one of the most powerful archdevils. Formerly an archon known as Triel, he now bears the titles the Fallen One, Lord of the Flies, Lord of the Lies, and the Slug Archduke. The last refers to the form he was cursed with after the Reckoning of Hell; Asmodeus has made his natural form that of a filth-covered giant slug with tiny arms.

Baalzebul is allied with Belial, but opposes Mephistopheles in all things, and desires revenge on Asmodeus for his humiliation during the Reckoning.