Seijūrō Shin (進 清十郎, Shin Seijūrō) is the Linebacker for Ojo White Knights, and the ace of the team. he is known for his strength, speed, and his famous Spear Tackle and was consider the strongest Linebacker in Japan. later on in the series he also plays offense as a fullback. He is the most prominent rival of the series' main character, Sena Kobayakawa.