Azazel, also known as the Yellow-Eyed Demon, is one of the two secondary antagonists. He is a powerful demon who is devoted to Lucifer and rules Hell in the latter's absence. He makes deals with women to allow him into their houses so that he can feed their children demon blood and turn them into Special Children, Lucifer's potential vessels for the Apocalypse. He then put them to fight each other until only one remains, who will open Hell's Gate and unleash all demons to Earth.

