Remi Ayasaki serves as a supporting character and Student Council mascot at Katagiri Senior High School, enrolled in Class 3-5. Despite her official council position, she contributes minimal substantive work. Her social life centers on her romantic relationship with Student Council president Kakeru Sengoku and her close friendship with vice president Sakura Kouno.

Physically, Remi features waist-length pink hair typically styled in high twin tails, with bangs covering her forehead and chin-length strands framing her face. Her large red eyes are distinctive. She wears the standard school uniform: a long-sleeve buttoned shirt, grey sweater, red bow tie, navy blue blazer, black skirt, long black socks, and brown loafers. A winter variation includes a vest over a long-sleeve shirt with rolled-up sleeves.

Remi exhibits a generally childish personality, expressing emotions transparently and often relying on others for help. She demonstrates moments of maturity, particularly concerning interpersonal relationships. Academically, she struggles and requires after-school tutoring. She habitually refers to herself in the third person.

Outside school, she enjoys reading fairy tales. She maintains a significant interest in entomology, curating an extensive insect collection in her room that earned her the "Insect Queen" nickname, though she possesses a specific aversion to dragonflies. Her room decor reflects this passion. Remi lacks culinary skill, mirroring Kakeru Sengoku's own cooking ability.

Her narrative role remains consistent and minor throughout the series. While involved in Student Council events and friend interactions, she experiences little personal development or significant focus in later story arcs. Her contributions primarily involve interpersonal dynamics within her relationship and friendship, rather than independently driving major plots.