She is a cabbit, a small, rabbit-like creature that hatched from an egg in the Kamidake II, Seina Yamada's ship and was given her name by Seina himself. She is the younger sister of Ryo-Ohki, the daughter of Washu. Like Ryo-Ohki she is the biological computer-unit and, at first, the principle power source of the Kamidake II, which can fluctuate depending upon the mood of Fuku.