|First Appearance||Formless Planet Nuruba|
Tsuru and Suru's father has lived his entire life on Nuruba. He feels that because his kind will never have to worry about losing their form and dealing with the psychological effects of that, they are the perfect being. He tries to instill this belief into his children but they do not believe it to be true and desire to take a form.
Refusing to heed their father's wishes, Tsuru and Suru attack the Galaxy Express during a routine stop. They are successfully able to attack Tetsuro and Maetel and steal their form, but Tetsuro eventually is able to overpower them and the two end up being rescued by their father. Despite the failed attempt, the two say that they will continue to seek a form.