Pazuzu

Pazuzu is a main antagonist, demon and character from the 1971's horror novel  The Exorcist, but made become extremely popular by the 1973's horror film adaptation of the novel. (seen in some screamers), Pazuzu appears as a demon who possesses Regan MacNeil, Cheche, Damien Karras & Kokumo.

Pictures of Pazuzu are commonly used in screamers, like including: Where's Waldo? and other games and websites.

Eileen Dietz
Pazuzu's face and the role was played by Eileen Dietz.

Links

 * "The Exorcist" film (Wikipedia article)
 * All Screamers Containing Pazuzu