Demon

Demon Yasao (出門 優雄), also called Demon (デーモン), is a scout character.

Plot
Demon appeared in episode 9, along with the gang that had a fight with Kusaka Ryuuji's gang. He provoked Kusaka into fighting him, leading Kusaka to change into his beserker mode. Demon and his gang then got frightened and left the stadium.