Kyotarou Ooshima

大島京太郎, Kyo-san, Chief

Kyo is a tough-looking member of the Yakuza, but he is very close with Kumiko. When he was younger, and Kumiko was a little girl, he taught her how to fight and defend herself when she was being bullied in school and teased because of her Yakuza connections. (Source: Wikipedia)