cold and stoic. sometimes rude. would never allow himself to hit a woman. best friend with Mikey so de known as Manjiro Sano. his real name is Ken Ryuguji. good friend with Takemichi. 16 years. because of the absence of parents lives in a brothel. 16 years. inside he is caring. in fight , he prefers the power of a blow that he can boast of. Gets little annoyed when you or Mikey call him Ken-chin but he don't mind. fact that he grew up in a brothel, he is not embarrassed by the female’s body