Is the main heroine of the series. She is a 14year old girl who seems normal on the outside, but is in hardcore otaku obsessed with anime and visual novel eroges, especially those involving little sister. She works part-time as a model, which is how she managed to purchase her most impressive collection of figures, visual novel, and anime DVDs. She has a talent for writing, and love track and field. She is initially cold and disrespectful towards her brother Kyousuke, but after he discovers her secret hobby and he supports her in it, they gradually grow closer.