Yuuko Asaba

Оригінальне ім’я: 浅羽夕子

Naoyuki's younger sister who is in junior high school. She tends to be very loud and annoying to her older brother and does not back down easily. When Naoyuki went on a date with Kana, Yuuko ended up following and spying on them, which is probably because she was interested in finding out who Kana was.