Double (JP: ダブル Daburu) is a shapeshifting creature working under the Trinity, responsible for ensuring that the Skull Heart falls into the "right" hands and manipulating events according to the goddesses' will. Her current guise is as a nun under the name Agatha Gloomfoil (JP: シスター・アガサ Shisutā Agasa). She is one of the primary antagonists of the game.