Utau Hoshina is a junior high student model turned singing idol. She is actually Ikuto's younger sister, Utau Tsukiyomi. Utau had tried to find the Embryo to release her brother from Easter, but she never succeeded. Utau is very attracted to Ikuto and becomes extremely jealous of Amu because Ikuto shows an interest in her. She kissed him in episode 29. However, she eventually accepts Amu and they become friends. She has become good friends with Kukai in the anime and manga.