Saika Totsuka  

Sai-chan, 戸塚 彩加

Saika is a member of the tennis club who identifies as male but has a feminine appearance. He prefers others not to assume his gender. His female peers call him "The Prince." During their first encounter, Saika sought assistance from Hachiman in joining the tennis club, which was rejected by Yukino. Afterward, he requested aid from the service club to enhance his tennis abilities. Eventually, Saika became one of the few individuals in class 2F who communicated with Hachiman and frequently spent time with him.