Remi Ayasaki attends Katagiri Senior High School in class 3-5 and serves on the Student Council. Her role there is primarily symbolic, functioning as a cheerful mascot who contributes minimally to administrative tasks. She possesses waist-length pink hair, usually styled in high twin tails with bangs and chin-length strands framing her face, and red eyes. Standing 158 cm tall, she wears the standard uniform: a long-sleeved buttoned shirt, gray sweater, red bow tie, navy blue blazer, black skirt, long black socks, and brown loafers, switching to a long-sleeved shirt under a vest in winter. She maintains this hairstyle consistently after a compliment from Kakeru Sengoku, though it changes briefly during arguments with him.
Her personality mixes childlike exuberance with surprising moments of maturity. Openly emotional and straightforward, she often refers to herself in the third person. While generally whimsical and carefree, she displays genuine insight and concern regarding her friends' relationships and emotional well-being. Academically, she struggles significantly, requiring frequent tutoring and help. Her lack of intelligence is a recurring trait, sometimes humorously compared to Izumi Miyamura. She is also notoriously poor at practical tasks like cooking.
Remi comes from a close-knit family sharing her passion for entomology. Her room houses an extensive insect collection, earning her the nickname "Insect Queen," though she specifically fears dragonflies. She enjoys reading fairy tales and other books, an interest that first connected her to Sengoku, and collects realistic insect stickers and magazines.
Proficient with computers, Remi faces challenges in most other areas, particularly academics and domestic skills. Her strengths lie in social adaptability and unwavering optimism. Relationships are central to her character. She is the girlfriend and eventual wife of Kakeru Sengoku, with whom she shares a daughter, Shizuru Sengoku, after graduation. Their bond began over mutual book interests freshman year. Her best friend is Sakura Kouno, whom she supports emotionally and accompanies frequently. She shares a close rapport with Kyouko Hori, discussing relationships and personal concerns. Remi assigns playful nicknames to friends, like "Kyon Kyon" for Hori and "Yanagin" for Akane Yanagi, whom she often seeks out between classes. She openly admires Izumi Miyamura's appearance but treats such remarks as jokes.
Key plot points involve her inadvertently causing misunderstandings, such as losing paperwork and blaming Kyouko Hori, leading to temporary class disapproval. Her relationship with Sengoku evolves from friendship to marriage, marked by his discomfort visiting her insect-filled home. Post-graduation, she transitions into married life and motherhood.
Her birthday is June 6. She uses the self-assigned nickname "Remi," remains popular among male peers despite indifference to their attention, and assigns creative nicknames in her phone contacts. She ranked 14th in the series' character popularity poll. A signature quote reflects her self-awareness: "I'm cute, after all," often stated in response to compliments about her appearance.