Tetsu is one of Kumiko&#039;s lackeys. He is a member of the Yakuza group, and is very devoted and protective of her. He and Minoru always keep an eye on Kumiko and do their best to help her when they can. Kumiko took him in when he was a teen, calling him a &#039;younger brother&#039; since the family didn&#039;t accept underage kids, and he had no where else to go. (Source: Wikipedia)

Kumiko "Yankumi" Yamaguchi enters Shirokin High School to become a math teacher. She's assigned as the homeroom teacher for class 2-4, populated by a gang of delinquents.  At first, the class tries everything to rattle her cage, but to no avail. In a short period of time, Yankumi gains the respect of the class. But what the school doesn't know is that she's the heir to the Oedo Group, a powerful yakuzan clan. So while Yankumi struggles to excel in her career as a teacher, she must also keep her yakuza background a secret.<br>
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(Source: Media Blasters)

Born in October 9, 1960 in Long Island, New York, USA in and worked for companies in the area. came out as a trans woman in 2008. Was a proud Socialist, Liberal, and Democratic party activist. Played the game Second Life under the username Kendra Bancroft, where she ran the city of Neualtenburg ("New Old City" in German). Sister of video game translator Jeremy Blaustein and went by the full name Madeleine Blaustein. Died December 8, 2011, age 48, of a stomach virus.

__Height:__ 165 cm

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Fresh out of college, Kumiko "Yankumi" Yamaguchi becomes a math teacher at an all-boys high school. Unfortunately for her, she's assigned by the school board as the homeroom teacher for class 3-D, which happens to be the class of delinquent students. When the class attempts to make a living hell out of Yankumi's career, they fail as her persistence and aggression gain her respect. However, little does anyone in the school know that Yankumi is actually heir to the Kuroda Ikka—one of Tokyo's most powerful yakuza clans.
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(Source: Anime News Network)

Note: Chapter count includes 9 extra chapters in Volumes 9-15

Tetsu Asakura