Half-sister of Mayu Himemiya, she desires nothing more than to live a normal life while secretly supporting Mayu's rise to fame. Initially, she pays little attention to the butterfly-shaped birthmark on her finger. However, when Tsubame, the most popular boy in school, approaches her with the tale that she is his fated love from long ago, she finds herself drawn into uncovering more about their past lives and those of many others bearing the same mark.
She too is a reincarnation of Agemaki, but from a different era, making her not the Agemaki Tsubame was searching for. Despite her initial dislike for him, they gradually grow closer and eventually start dating as time progresses.
