Kamyu is the second princess of Onkamiyamukai, a race of angel-like people who act as priests and peace-keepers for the land, and she is also the younger sister of Urtori. She befriends Aruruu, Yuzuha, and Mukkuru, and is often seen playing with them.

Sometimes, during a full moon, another personality overtakes Kamyu. It is vampiric and has a strong sexual desire.