In the manga, Kyuusuke lived in a shop that sold soba, his favorite food, and he had an elder sister, Kotono Sarashina, who made a Sailor V button for him. When Chibiusa admired the button Kyuusuke refused to get her one, but after the two of them helped defeat the vampire Lyrica Hubert, he had his sister make a Sailor Moon button for her. He was also friends with Sorano, and he seemed to think Sorano should be more athletic.