Shimizu Ryohei is a second year student at Karasuno High School and is the younger sibling of Shimizu Kiyoko. They are biologically female, but rather identify as non-binary and dress more masculine due to the fact they don't really feel content with identifying as female on personal experiences. Due to such, most students see them as a male student and treat them as such. Especially considering Ryohei is on the boys' volleyball team. Go figure right? Ryohei typically binds their chest during school, and when they're playing volleyball they'll wear a sports bra with a tank top over it to ensure no one notices their chest. Very few just happen to know of their past, and respect their wishes to not identify as female while the rest don't know just yet. The teen is also shorter than Hinata Shouyou and Nishinoya Yuu, standing at 155cm which brings pros and cons to their height, but they don't mind it. They use their smarts with their height to trick the opposing team and to help their own.