Sayori Rikimaru, who prefers the nickname "Sayorin," is an underclassman attending the same school as Isshu Sagisawa. She harbors romantic feelings for Shin Inaho, a recurring character residing in Isshu's apartment building. Sayorin also admires her senior Miyabi Fujiwara, recognized for both intelligence and beauty. Miyabi participates in the Naginata club with Ayumu Kise, though Sayorin's own club activities remain unspecified.