Kumiko Yamaguchi

Driven by an unwavering idealism, this recent university graduate serves as a dedicated new instructor at Shirokin Gakuen. Although she strives to inspire her students toward graduation, her background is unexpectedly gritty; raised by her yakuza leader grandfather since her parents' passing, she often displays eccentric habits like using underworld slang. Despite these peculiar mannerisms and a tendency to evade the police, she remains a deeply compassionate educator with profound faith in her pupils' potential.