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. Tatsumaki especially dislikes being ignored or being called things like "brat" and "runt". Despite her arrogant personality, she feels obligated to defeat monsters and considers her job as a hero to be a duty, accepting any of the Hero Association's requests to defeat monsters.