Tyrannosatan (Demonic Imperator Tyrannosatan) is the final boss of Deathsmiles. This powerful demon appears when Jitterbug attempts to open a portal to the real world, coming through the portal and eating Jitterbug, forcing the Angels to fight him. After he loses half of his health, he loses his body and Jitterbug falls from it. Though Tyrannosatan is ultimately destroyed, he still survives as a ghost, becoming the familiar of Supe in the second game.