Ken Ryuguji/Synopsis

History
Draken was born in Shibuya's red light district. He never knew his father and his mother was a prostitute who abandoned him and died when he was two years old.

Toman Arc
Ken and Manjiro visit the fights organized by Masataka Kiyomizu. One of the guys introduces himself to Manjiro, but Manjiro ignores him and continues with Ken explaining that Manjiro talks only to those that he is interested in. As Manjiro passes Masataka, Ken kicks Masataka in the guts, telling him to bow more when he faces Manjiro. Manjiro takes a liking to Takemichi and declares they are friends. Manjiro and Ken then disband the fight club as it brings bad name to Toman.

The next day, Manjiro and Ken visit Takemichi in school. Ken beats multiple third years in the hallway as they irritate him and then orders them to line on their guts, so that he and Manjiro could walk over them. They want to hang out with Takemichi, but Hinata thought they are there to kidnap Takemichi and slaps Manjiro and attempts to leave with Takemichi. Ken stops her, but as she explains she wants to protect Takemichi, Takemichi then places his hand on Ken and tells him to release Hinata as there are things he won't give up ever again and asks them to not hurt her. After the situation is cleared and Manjiro has no bad feelings, Ken tells Takemichi that he threatened him, but its fine as protecting a girl is old school. Manjiro, Ken and Takemichi then go out together, where eventually Manjiro reveals his plan on making new era of delinquents and wishes Takemichi to be part of it.