Kozato is a supporting figure in the second season of Gurazeni, holding the position of top team pitching coach for the Jingu Spiders professional baseball club. He is a seasoned older man who carries himself with a calm, unflappable presence; with black hair worn up, a full moustache, and a cap frequently shielding his face, his eyes are almost always depicted in a composed, closed state. His personality is defined by quiet confidence and a measured, no-nonsense outlook, allowing him to handle the relentless pressure of the sport without visible agitation. While the series does not delve extensively into his personal history or inner drives, his commitment to the team’s performance and the development of its pitchers is clear in every appearance.

Within the story, Kozato operates as a key part of the coaching staff, working closely alongside manager Tanabe to shape pitching strategy and prepare the relief corps for the demands of the season. His primary function is mentorship: he draws on decades of hard-earned experience to provide practical, stabilizing advice that helps pitchers like Natsunosuke Bonda and Akira Shibuya refine their mechanics, sharpen their mental approach, and navigate the money-centered anxieties that define professional baseball in the series. His most notable ability is a deep, intuitive grasp of pitching fundamentals, game situations, and player psychology, which he communicates with straightforward clarity rather than flashy instruction. Kozato does not undergo dramatic on-screen development, serving instead as a reliable, steady anchor for the team’s pitching staff, and his understated competence reinforces the realistic, adult tone of the story.