The target the brothers are ordered to watch. She was born on the same day that her sister, Momoka, died and believes that she is Momoka reincarnated. The death of her sister caused her family to fall apart, she now lives only with her often busy mother. She possesses Momoka's diary, the entries of which she follows religiously for the purpose of "destiny". It is because of these entries that she stalks Tabuki Keiju, who was very close to Momoka. She believes that by replacing her sister, she will be able to bring her family back together.