Buriel is a demon and a wandering duke of the air. Buriel has many dukes and servants to do his bidding. All are evil and are hated by other spirits. They must be summoned at night because they hate the day. When they appear, they have the form of a serpent with a virgin’s head and speak with a man’s voice. Buriel’s major 12 dukes are Merosiel, Almadiel, Cupriel, Sarviel, Casbriel, Nedriel, Bufiel, Futiel, Drusiel, Camiel, Drubiel, and Nastros.