Kumiko Yamaguchi

A university graduate and a newly hired teacher at Shirokin Gakuen. She is very idealistic and wants to inspire her students and help them graduate high school. Since the age of 7 when her parents died Kumiko has been living with her grandfather who is the head of a yakuza group. Despite this strange upbringing and the bizarre mannerisms she has picked up from it like her use of yakuza slang and a habit of running from the police Kumiko is a kind girl who has a strong faith in her students. Source: Wikipedia