Utau is a 14-year-old junior high/high school student model turned into chant idol. Utau Hoshina is actually only her stage name, since her actual name is Utau Tsukiyomi (月詠歌唄 Tsukiyomi Utau), and is Ikuto's younger sister. She is in l’amour with Ikuto and is constantly trying to win his affection, and thus becomes extremely agitated when she notices that Ikuto is interested in Amu Hinamori. However, she eventually becomes Friends with Amu. Utau was both independent artist (with her hit song, Meikyuu Butterfly) and the vocalist of the indie band "Black Diamond", produced par her manager,...