She is Komeiji Satori's younger sister. She wanted to avoid the hate and dislike which Satori experienced due to her mindreading abilities, so she sealed away her own Third Eye. This backfired, since she gained the ability to read and manipulate peoples' subconscious, an even greater ability. However, she also became much more carefree as a result, and didn't mind as much.
She now spent much of her time wandering the world aimlessly. After her encounter with the heroine in Subterranean Animism's Extra Stage, however, she became curious, and wanted to start actually meeting people.