The Esper Saga
Siren is the Esper of Song and Music. She is one of only two Espers that can travel freely between worlds, the other being Diablos. Siren appears as a naked, yellow-skinned woman with wings extending from her hair. She always carries a magical harp with her. Siren was captured by Ogawa Beatrice and held prisoner in Trakonia, until she was freed. Siren has no known children, and has no need for a Sanctum.