Belial is a 10-foot-tall handsome humanoid with chalky skin and reddish-brown hair and beard. Rams horns curling from his wide brow flicker with hellfire. Charred wings sprout from the fiend's back, revealing the last vestiges of his once angelic form.

Belial is the most capricious and chaotic of the princes of darkness, leaving many among the courts of Hell to wonder if he has not been fully corrupted by demonic influences. Belial, more than others has made pacts with demons, and dark gods of the Underworld. He is always on the hunt for portals that allow him greater time and access to the mortal realms.

Belial's lair is found in the storm-thundered Hell Ring of Covetous where the lightning-wracked skies flock with harpies, night hags, succubi, and erinyes. Belial's legions throng with his many progeny, themselves brutal combatants who use complex asymmetrical tactics to finish off foes who often greatly outnumber them.