Moutoku Sousou

Moutoku Sousou was a common fighter who was bullied as a child. He and Chuukou Kyocho went to the same dojo, where Kyocho stood up for him; one day, when Sousou came to the dojo, he found the other male students molesting Kyocho for being a tomboy and standing up for him. This triggered Sousou's first dragon awakening, ending with him killing the rest of the students. At some point, Sousou also killed Bunyaku Kansui, which caused Mouki Bachou to seek vengeance against him.