Yuu Shishio (志々尾雄, Shishio Yuu) is the third oldest brother of Gen Shishio.
He was shorter than his older brothers, and had dark hair that stuck out on the sides.
Yuu did not like participating in integrated martial arts, considering it to be boring. He was usually the only one of his brothers to notice anything odd about Gen, but was just as eager to bully him as the others were.
- Yuu's name (雄) means male.
- ↑ Kekkaishi manga, Chapter 71