Sayaka Saeki is a hardworking, intelligent, and dedicated individual. She is highly observant and skilled at recognizing subtle social cues and interpersonal dynamics. Her composed and analytical nature makes her an effective leader, particularly in her role as student council vice president.

Despite her strengths, Sayaka can come across as aloof or even unapproachable at times. She has little patience for those she perceives as lazy and prefers a direct and straightforward approach when addressing problems. While she maintains a calm and collected exterior, she experiences feelings of loneliness and jealousy, particularly in matters related to Touko Nanami. However, she suppresses these emotions to avoid burdening others. One of the few people she openly confides in is Miyako Kodama, who acknowledges Sayaka’s selflessness and considers her a kind person for prioritizing the feelings of others over her own.

Sayaka harbors unrequited feelings for Touko, and after witnessing her personal growth following the school play, she begins to believe she may have a chance with her. Mustering the courage to confess, she ultimately faces rejection. However, she handles it with grace, choosing to remain friends with Touko despite her feelings. She also comes to accept Yuu Koito and Touko’s relationship, demonstrating emotional maturity and a willingness to move forward.

Sayaka Saeki is regarded as one of the more elegant and beautiful students at Tohmi Higashi High School. She has waist-length light brown hair, which she styles with a pair of braids at the back, and square-cut bangs that frame her forehead. Her defining facial feature is her green eyes, which complement her refined and graceful appearance.

Sayaka Saeki was born into a well-off family and attended Tomosumi Girls’ School (友澄女子, Tomosumi Joshi), an exclusive all-girls institution with integrated middle and high school divisions. During middle school, she developed a romantic relationship with an older girl who had confessed her feelings for her. Initially uncertain about the relationship, Sayaka eventually grew to reciprocate her feelings. However, after advancing to the high school division, the older girl abruptly ended their relationship, dismissing it as a childish phase. This left Sayaka heartbroken and deeply frustrated.

Following middle school, Sayaka chose to transfer to Tohmi Higashi High School, a co-educational institution, where she met Touko Nanami during her first year. Sayaka was quickly drawn to Touko’s confidence, strong work ethic, and outgoing personality. The two became close friends after joining the student council, working alongside each other in leadership roles. Over time, Sayaka realized that she had fallen in love with Touko but chose to keep her feelings to herself, unwilling to risk their friendship. Instead, she resolved to continue supporting Touko from the sidelines, believing that being by her side was enough.

The name Sayaka (沙弥香) is composed of “sa” (沙) meaning “sand,” “ya” (弥) meaning “increasingly” or “all the more,” and “ka” (香) meaning “fragrance” or “fragrant.” Her surname Saeki (佐伯) consists of “sa” (佐) meaning “help” or “aid,” and “eki” (伯) meaning “count,” “eldest brother,” or “chief official.”