Pazuzu is the name of a very powerful demon that is the most prominent antagonist of the Exorcist series of films. Based upon the real-life demon of religious lore, Pazuzu is depicted as being a very high-tier demon that serves as king of the demons of the wind.

Eventually, Pazuzu, having been vanquished twelve years prior by Lankester Merrin, was ready for a final showdown with him. When 12 year-old Regan MacNeil began using a Ouija board she had found in her basement, Pazuzu, along with at least two demon cohorts, answered her call. Pazuzu identified himself to Regan as "Captain Howdy". Regan, being an unbeliever in God, and currently going through emotional distress from her parents' divorce, was set up for demonic oppression.