Seijuro Shin

Seijuro Shin is the ace linebacker for the Oujou White Knights and serves as Sena Kobayakawa's primary rival. While he often presents as withdrawn and antisocial, he maintains close ties with teammates Haruto Sakuraba and Makoto Ootawara. Coach Shoji Gunpei recognized Shin's immense talent during a trial alongside Sakuraba, prompting the coach to implement strict measures to ensure his total dedication to the Oujou American football club.