Yoichi Isagi (潔いさぎ世よ一いち Isagi Yoichi?) is the protagonist of the Blue Lock series. Isagi is a second-year high school student, who previously played as a forward for the Ichinan High School football team. When he arrived at the Blue Lock facility, he became a member of Team Z for the First Selection. His main goal is to become the world's best striker, defeating anybody in his path, including his greatest rival in Blue Lock, Rin Itoshi.