Habara/In the Series

History
Habara used to be an unparalleled bully in her elementary school days, and was known as the 'Archdemon of the East Yada Elementary'. She was known for her strength and violent tendencies, Karasawa being one of her most famous victims. According to Takahiro, even in high school, the boys who live around there start trembling upon hearing her name.

To end this reign of terror, ten of the school's famous warriors from 1st through 4th grade (Team 10) teamed up and challenged her. Yanagin, the Chemistry Club President and Rubber Shooter were three of them. Only after the great battle (which ended in a draw) did the Archdemon Habara gradually lose her brutality. Team 10 then appointed Yanagin to watch over Habara, and they ended up becoming friends over the years.