Baalzebal may take any form but is commonly encountered as a thin, 12-foot-tall figure with four insect-like arms that end in long hairy fingers. He is mostly bipedal, with translucent fly wings that fold down the back of rich silk robes that hide his bloated abdomen. His crowned and horned head resembles a cross between a human and fly with a thin cruel face punctuated by huge bulbous fly eyes, each of which can see in 333 degrees.

Baalzebal is one of the original fallen. Known as the Lord of the Flies, Baalzebal dwells in a fetid palace in the swamps of Stygia where his forces face the dual threats of incursions by the minions of Tsathogga whose own realm feeds the river Styx, and by the covetous intent of the other rulers of the Rings of Hell who seek to overthrow him.