Usokawa is a classmate of Ryuuichi and Hayato. He is overly fixated on getting a girlfriend.
He has light-coloured hair and wears glasses—his eyes themselves are very rarely visible.
He is a source of comic relief, appearing throughout the series mainly to lament being single. He is desperate to get a girlfriend, particularly liking classmate Yuki.
His first major appearance is when he tries to record a video of the children in order to win the grand prize of a contest.