Koromo Sasori is a 24-year-old associate at the Butterfly Law Office, specializing in defending magic users within the special courts overseeing magical law. She possesses a voluptuous figure, hazelnut-colored hair, red eyes, and stands 163cm tall. Her typical attire features an orange and black striped shirt revealing cleavage, a black skirt with white frills, reddish tights, and heels.

Her personality features a flamboyant, overtly perverted demeanor. She frequently makes erotic jokes, engages in lewd actions like fondling her own breasts, and openly brags about her romantic encounters. Despite her provocative antics, she demonstrates genuine concern for her colleagues' safety and exhibits kindness during serious situations.

Koromo's primary magical ability is prediction magic, manifested through tarot card readings. This power allows her to accurately foresee future events, making her an effective fortune-teller. Her divination skills aid case preparations and investigations undertaken by the Butterfly Law Office. She functions as a supporting member of the legal team, providing comic relief through her behavior while occasionally assisting cases with her divination.