Megumin, is a powerful arch-wizard with black hair, red eyes, and chūnibyō characteristics. Her slim figure often makes her mistaken as a child. She wears a red top and skirt with a witch hat and cape. She is hyper, lively, and speaks in an old-style Japanese dialect. She possesses great intelligence but lacks self-control, obsessed with using her one-hit Explosion Magic daily. While calm and cheerful, she becomes aggressive when challenged. She deeply hates being treated like a child.