Natsumi Hayama

Оригінальне ім’я: 羽山夏美

Natsumi is Akito's older sister. In the first few episodes she is very mean to her younger brother and blames him for the death of their mother. Later a movie is released with a story quite similar to the Hayama household which is a wake-up call for Natsumi. Later she becomes much nicer to Akito and they start acting like a family again.