Yunyun

She is known by the nicknames "The One Who Bears the Azure Lightning" and "The One Who Roars with Thunder". She is the daughter of the leader of the Crimson Demon Clan and Megumin's self-proclaimed rival. She is 13→14 years old. She is slightly taller than Megumin and has a well-proportioned, slender figure, and is a beautiful girl who is well-developed (Megumin clearly admits defeat in this regard).

Her profession as an adventurer is Arch Wizard. She can use intermediate and advanced magic, and unlike Megumin, she is an excellent magician who can also handle physical techniques.

She is usually gentle and kind to everyone, but on the other hand, she gets angry at Megumin's remarks and actions and retorts, and shows anger with Aqua and others when she hears a certain remark from Kazuma, showing a side of her that occasionally gets serious.

In the Crimson Demon Village, which is full of eccentrics, she has a rare common sense personality and is embarrassed by the unique self-introduction of the Crimson Demon Clan. In other words, she is a minority in the Crimson Demon Clan and is treated as a weirdo. She had no friends during her school days, and Megumin teases her as a "loner", but she denies having friends out of pride. She has also experienced various dark histories, which she is trying to hide. She and Megumin are in the same grade, and she often challenges Megumin, who is more successful than her, and each time she does, she takes her lunch.

She considers Megumin as a rival and a friend, and when Megumin acts indifferent towards her, she clings to her in a panic. She is shy and naive, but she is the type to say what needs to be said, and she can brace herself in situations where she needs to protect someone, making her strong in adversity. Since coming to Axel, she has made more friends and is enjoying her days, and even after learning advanced magic, she continues to live in Axel instead of returning to the Crimson Demon Village.

In spin-off works, she is often considered a double heroine alongside Megumin. She also learns about the existence of succubi in the town of Axel and tries to subdue them on the spot, but is stopped by the "Masked Devil".

In the official Kadokawa Sneaker Bunko website's TV anime adaptation commemorative character popularity poll, she ranked 5th.