Itokawa Shuusaku was a friend of Toudou Jinpachi during their middle school years. His family runs a bicycle shop called "Cycle Shop Itokawa."
Shuusaku was a small boy with short, black, cropped hair that had a very sharp widow's peak; he had large blue eyes.
He seemed to be a kind boy who recognized strengths in others even if they themselves couldn't, although he was quick to jump to conclusions. He didn't like being teased about his crush on Minami, and got nervous when it seemed someone else was after her affection.