Ayame Shiina, a second-year student in Tsumugino High School’s class 2-A, shares an inseparable bond with Sayuri Amamiya, uniquely entrusted with her phone number—a testament to their unwavering trust. As a volleyball club standout, her dynamic athleticism and teamwork solidify her reputation as one of the team’s elite players, fostering a spirited camaraderie with teammate Tsukasa Kasuga.

Approachable and sociable, Ayame effortlessly bridges connections among classmates, stepping into leadership roles to maintain harmony when responsibilities divert Sayuri. Her blend of warmth and tactful honesty earns peer respect: she addresses missteps directly yet compassionately, pairing critiques with actionable solutions.

Beyond academics and sports, Ayame prioritizes emotional support for her friends, guiding Tsukasa and Sayuri through their romantic feelings for Riku Aoba with protective empathy. Her selflessness often leads her to prioritize others’ needs above her own. Visually, her appearance fluctuates between light red, orange, or pink hair, complemented by striking cyan eyes.