Mio Kofune

She is <a href= "https://anilist.co/character/155712/Ushio-Kofune">Ushio</a>'s younger sister and a first-year high school student. She is good at sports, belongs to the swimming club, and has tanned skin. Despite the death of her older sister, she has a healthy side, such as her cheerful attitude toward <a href="https://anilist.co/character/155703/Shinpei-Ajiro">Shinpei</a> when he returns home.