Kotone Etsuko (Harp Sound Joy Child, 悦子琴音, Estuko Kotone) is the Head Ninja of Hoshigakure, and an unorthodox Kunoichi. Assistant to the legendary Chieko, she is talented in her own right. One of the few who have made Hair-Ninjutsu an effective fighting style, she has become renown for it as the Hair Razor. Utilizing Yin and Yang, she has also shown some prowess in fuinjutsu, effectively turning those two natures into weapons for Hoshi.