Mikoto Tachibana is a popular third-year student at a prestigious high school, sharing a class with student council president Mitsuki Shiina. She possesses distinctive long red hair styled in twin tails with blunt bangs swept to the side, teal-colored tareme eyes, and a slim, pale frame standing 153 cm tall with measurements of 81-55-81 cm and a B-cup bust. Her birthday falls on September 3rd. A kind personality defines Mikoto. She actively participates in the school tennis club, often seen in her tennis attire. Her wardrobe also includes the standard school uniform and casual outfits like cardigans, coats, minidresses, miniskirts, and clothing featuring ribbons. Within the original visual novel, Mikoto features her own narrative route, unlocked only after players complete all other main character paths. Across official anime, OVAs, and other media, her role remains consistent as a supporting character without elaborated personal history or significant development.