Usagi

A divine beast in the form of a white rabbit. Holds the titles of "Kick Saint" and "Ear Saint." Its species is a subspecies of "Fighter Rabbit" known as "Kick Rabbit." Possesses such attack power and agility that it can take down even powerful monsters that Yūya and others hesitate to fight with a single kick. Physically among the strongest, but struggles with magic. Its goal is to find a successor to the "Saint," and it meets Yūya by chance after whimsically entering the Great Demon Wilderness. It tries to make Yūya the successor after explaining the situation, but Yūya gently declines. Subsequently, it forms a mutual mentor-disciple relationship with Yūya and Night, teaching them kick techniques in exchange for learning body enhancement magic from Yūya. Yūya calls it "Master Usagi," but it never introduced itself, so it's unclear whether "Usagi" is its name or if it's called that for convenience due to having no name.