Kiryuu Youichirou

Kiryuu Youichirou (桐生 陽一郎) also known as Kirio (キリオ) is a second year student at Kushima High School.

First and Second Years Fight
Kiryuu is introduced alongside Seji and Morita Isami telling Chikura Tooru they need to move or they'll be late for class. When Tooru he declares he'll take out Shiiba Gaku. Kiryuu mentions about them having some fun beating some first years.

Stood underneath the school yard shelter with Morita Isami, Kirio and Seji, while reading a book. They briefly discuss Shiiba Gaku. When Seji suggests splitting Marumo Taiji, Urabe Osamu and Shiro. Isami declares they'll do it like usual to which Kiryuu agrees. When the three settle it with a game of rock paper scissors. Tooru mentions Kirio will get Shiro.

Inside the school, Kiryuu confronts Shiro, where he introduces himself. Questioned if he just came to talk, Shiro asks does he have nothing else to do. Kiryuu mentions that he's strong and there's no one who measures up in the second and third years.