Mui

""Even if you change appearance and you stop being you, I will continue to love you until my dying day.""

Mui (ムイ, Mui) is member no. 2 of the Round Table and Shen's subordinate. She is a Negator with the alias Untruth.

She lived in China before becoming Shen's assistant in Union.

Appearance
Mui is a short girl of chinese descent. She has medium ruby color hair with white bun covers in the back of her hair. Being Shen’s subordinate, she wears the same outfit as him. This outfit consists of a white sleeveless collared shirt with a red necktie. She also wears black baggy pants that expose the hips and black gloves that go up to her arms.

Personality
She acts like a secretary for Shen, whom she seems to be in love with. Mui is a kind girl who is very caring to her comrades. She respects and is very protective of Shen, even getting angry and attempting to support Shen when Feng harms him. Mui is very determined to be able to fight along side and protect Shen anyway she can despite her not having a negation ability.

Intro Arc
Mui welcomes Shen after he comes back from his fight with Andy. He comments he had a good fight and asks her to smooth things with the top brass. Mui tells him that at lake Baikal is Gina and she is in pursuit of Andy, but Shen believes that Andy and Fuuko will handle it.

Spoil Arc
Mui helps Fuuko dress with the Union's uniform. As Fuuko wonders if she will be coming with them, Mui explains that she is neither a Negator or member of the roundtable and because of that she doesn't have an emblem and can't participate in quests. She then asks Fuuko to look after Shen.

As Andy comes and touches Fuuko accidentally, a magma erupts from the wall and Mui quickly plucks it. An alarm rings and they are informed that an UMA No.1129 has escaped. Mui reveals that UMA Clothes and that it latches on a person transforming to their most desired clothes and as the person is bewitched by the clothes, the UMA takes control of the body and goes on a rampage. As the Clothes attack Andy and he knocks its host, preferring females, Clothes latches on Mui, but her clothes barely changes. Using Mui, it attacks Andy and Shen, but Fuuko manages to touch her and knock her out with her unluck. Mui apologize for her disservice to Shen, the one who saved her life, but he tells her her kung-fu was amazing and her daily training paid off.

She later analyzes Spoil's beam and tells Shen that it exceeds the rules of Spoil and disintegrates anything it touches. As their fight continues, she manages to pinpoint Spoil's exact coordinates and Shen manages to send Spoil and Andy is space. When Andy came back from space, by Shen's orders, she beams Spoil's core and captures it.

Powers & Abilities
Untruth: Mui can negate any conscious thought her target has, causing them to do the opposite. It is unknown if the "Rules" of the ability has changed after it was transferred to her.

This ability was attained by Mui when Shen died and has now passed onto her.

Martial Arts Expertise: Being trained by Shen, Mui is very skilled in Martial Arts and hand-to-hand combat.

Multilingualism: Mui was able to speak Mandarin before the unification of world languages in which changed her main language to English. In extra vol.7, Shen said "I like you" to Mui in Mandarin but she didn't understand, so Mui borrowed Nico's books to re-learn Mandarin from the beginning.

Equipment
Artifacts: Mui appears to possess various artifacts in which she uses for combat to compensate for her lack of a negation ability. Shen does not approve of her using artifacts, she states she has 8 of them.

Basho Fan: A fan that can generate powerful gusts of wind. Mui used this to dispel Feng's dust cloud.

Trivia

 * Mui ranked 10th in the First Popularity Poll with 2025 votes.