Mio Kofune

Meet Ushio's younger sister, a lively first-year high schooler who’s all about that sporty life. With her tanned skin from countless hours in the sun, she’s a standout member of the swimming club, diving into competitions with a grin. Life hasn’t been easy since her sister passed, but she’s got this infectious energy that lights up any room—especially when she sees Shinpei come home. Her cheerful spirit is like a ray of sunshine, reminding everyone that even in tough times, there’s always room for a smile and a splash of fun. She's a breath of fresh air!