Shunsuke Yoshino is one of the school's athletes, and plays soccer, being very passionate and serious about the sport. His best friend is Yuu Mizuno, their friendship dating back to elementary school, and the two even played soccer together until Yuu quit. He's a quiet, yet intimidating kind of person, but he does have his soft spots, particularly for the Sanrio Hello Kitty, who he refers to as his "goddess of victory", or to put it simply, his lucky charm.

When he was younger Shunsuke was given a Hello Kitty charm by a girl he knew. He thanked her and proudly proclaimed he would win and show her his medal when he does. However, upon arriving at her house, he had found out she moved. Ever since then he became closed off and avoided anyone he didn't know, fans and teammates included. This was because he was scared of getting hurt and hurting others in the process of getting close to them.