U are Takemichi little sis. Ur brother was gonna fight against tenjiku, a big gang. U didn't know where their venue was. As u were walking, u realised 2 gangs fighting, but u ignored and continued walking. As u were walking away, Takemichi spotted u

Takemichi: Little sister!! I need ur help!! We are short of people fighting!! Please help! Please help defeat tenjiku and kisaki!!

All the toman and tenjiku members: what!?!?!??!! u have a sister!?!?!