Tatsumaki (タツマキ, Tatsumaki; Viz: Tornado), also known by her hero alias Tornado of Terror (戦慄のタツマキ, Senritsu no Tatsumaki; Viz: Terrible Tornado), is the S-Class Rank 2 professional hero of the Hero Association. She is recognized as one of the Hero Association’s most powerful heroes. She is an esper and the older sister and self-declared teacher of Fubuki. She and her sister are known as the Psychic Sisters (エスパー姉妹, Esupā shimai).

Tatsumaki is a petite woman, commonly mistaken for being much younger than she really is. She has an adolescent face with emerald green eyes, and green hair that naturally curls up on the ends. She wears a form-fitting black dress with long sleeves, and four high-cut leg slits that show off her shapely long legs and low-heeled black shoes. She is occasionally drawn in ONE’s simplistic webcomic style.

Tatsumaki has a rather brash, moody, hotheaded, and impatient personality. She is disrespectful towards most people, especially to those she deems incompetent. She is completely intolerant to those she deems impertinent, as shown when she slammed Genos into a large piece of rubble for retaliating against her verbal abuse of Saitama. Tatsumaki especially dislikes being ignored or being called things like “brat” and “runt”.