Kojuro is an androgynous boy with light-brown hair that he ties in a ponytail with two x-shaped hairpins that he wears on his side bangs and pink eyes.
Kojuro is a gentle and caring boy who seems feminine at first, but he is indeed a boy.
Kojuro is seen talking to Masamune Makabe and offering him food.
- The name Kojuro means "small" (小) (ko), "ten" (十) (ju) and "son" (郎) (ro).
- Kojuro's surname Shuri means "vermilion red" (朱) (shu) and "village" (里) (ri).
- Kojuro's eye color was changed from the manga to the anime, from blue to pink-ish.
- Kojuro madly loves sweets.
- Kojuro loves Neko Fujinomiya.
- Kojuro is extremely bad at school works as seen in a chapter of a test contest between Aki Adagaki and Masamune Makabe.
- Due to Kojuro's feminine appearance, most female haremettes in Masamune's class wanted to ship Kojuro with him, especially Tae Futaba..
- Kojuro loves eating usually sweets.
- Kojuro's first name and his friendship with Masamune may be a reference to the two samurai Masamune Date and his retainer Kojuro Katakura of the Date clan.