She is basically created to be the companion of Washu's other creation Ryoko, as well as her powerful spacecraft. Ryo-Ohki was created by combining a powerful creature known as Masu with some form of mineral lifeform. In Tenchi Muyo! Ryo-Ohki, Ryo-Ohki is a unique artificial lifeform created by the universe's greatest scientist, Washu. Ryo-Ohki (crystal) being grown next to an infant Ryoko. Overall, Ryo-Ohki's personality, traits and abilities vary greatly depending from series to series, but they usually include shapeshifting and a love for carrots. Ryo-Ohki is a cabbit: A cross between a cat and a rabbit.
Ryo-Ohki (魎皇鬼, Ryōōki) is one of the main characters of the Tenchi Muyo! metaseries. Kenshi Masaki ('adoptive' younger brother)