Kyouya was supposed to become the chief of his clan, but when traumatic events left him mute, his father decided he was unable to lead. Even without his voice, Kyouya's fighting skills were still unbeatable, so he was sent to the King as a gift. He was appointed as Prince Tsuki's bodyguard. Though it took some time, the two became friends, and Kyouya even began to recover his speech. Years later, Kyouya is still by Tsuki's side. His loyalty is unbreakable, though his stoic attitude is starting to crack. Tsuki has taught him about friendship, adventure, and the very strange concept of fun.

Shifter: Kyouya's cat form is a caracal, though he very rarely shifts.