Azmodan in The Black Worldstone cinematic.
Azmodan, the Lord of Sin, is one of the four Lesser Evils. He has ruled Hell for the last 300 years, following the events of the civil war between himself and Belial, which Azmodan quickly won. He is also the ruler of the Realm of Sin in the Burning Hells.
Although Azmodan has not yet been seen in-game, he has featured in a cinematic, and is known to be the major boss of Act III, where he attempts to lead the armies of hell in an invasion of Sanctuary.
His appearance reflects his moniker as the Lord of Sin; he personifies the seven deadly sins (wrath, greed, sloth, price, lust, envy, and gluttony) in his physical form, and his body is decorated with treasures and trophies. His face features two eyes on each side, with a large, glowing mouth full of razor-like teeth.
He also controls powerful demons who personify each of those sins, two of whom are already known about (Thousand Pounder, who reflects Gluttony, and Cydaea, the Maiden of Lust). He enjoys corrupting others, and is known to be the most seductive and charismatic of all the Great Evils, despite his hideous appearance.
