Ethereal Queen

The Ethereal Queen, also known as the Iselia or Iseria Queen, is a recurring hidden superboss from the Star Ocean series and in several other tri-Ace games. She is a Celestial Being, as is her weaker counterpart Gabriel Celesta, who often must be fought as a pre-requisite to find her. She is associated to the "The Incarnation of Devil" battle theme.

Across her appearances, her words reveal an arrogant personality. She views others as inferior, even offering servant positions. Upon defeat, she often asks the question "What will you do with the power you have?", which has an ironic side to it as there is usually nothing else to fight.