Kyohei Doujima

As a classmate of Riku, this character initially presented a tough, physically imposing appearance. He developed a fierce resolve to safeguard Sayuri from other boys, a commitment solidified after an encounter with Mr. Chick. Following a harsh beating, this experience led him to believe Riku was the right person to protect Sayuri, prompting him to insist Riku stay by her side, leading to their current friendship with Riku and his group.