White Wolf "Xue".

Yuki is a beautiful, stern girl with dark hair in a braid with two red ribbons and short bangs framing her face. She has dark eyes, usually empty. She wears a classic maid outfit: a black dress with a dark green flowing skirt and a white apron tied at the waist with a large bow at the back. She has a lace collar and a round-necked apron. She wears black fingerless gloves. On her legs are dark leggings that end in elegant lace-up boots with high heels. Sometimes she holds two large knitting knives in her hands.

Yuki demonstrated remarkable talent from a young age: by the age of one she already spoke fluently, at three she could run like an adult, and by the age of five she had become a polyglot.

Due to her rigorous training as a renowned assassin, Yuki possesses extraordinary athleticism, far exceeding that of a normal human. She has demonstrated superhuman abilities, such as being able to outrun motorcycles and trucks over short distances, jump to great heights, and leap over the roofs of buildings. She is particularly skilled with knives, which is necessary for carrying out assassination orders, being able to inflict multiple cuts and stabs in the blink of an eye. She also appears to have the ability to time her throws perfectly, as she can throw knives with such precision and accuracy that she is able to deflect bullets.

While working as a maid, she initially has difficulty performing various household duties, but over time, she quickly improves, becoming a proper maid who is able to perform these tasks efficiently.

Also after signing the "autograph", Yuki claims that he can speak more than twelve languages ​​(most likely at a fluent level), mostly orally, since during his time as a hired killer he traveled all over the world.

At first, Yuki enjoyed a life described as "the happiest in the world." However, her childhood was cut short by tragedy: her parents were murdered and Yuki was kidnapped by bandits who trained her to be an assassin. When she grew up, her sister rejected her and separated her from her, and her master, who had a difficult relationship with Hitoyoshi Yokoya, asked her to take care of him. From then on, she accepted the role of a maid and strived to become a "normal" girl with the support of her young boss, Vas.

In her past life as an assassin, Yuki (Xue) was a cold woman who obediently followed her master's orders to eliminate targets, earning the nickname "Xue the White Wolf" for her relentless pursuit of prey, not letting go until the job was done.

As a maid, Yuki is gentle and kind-hearted. Although she is sometimes cautious, preparing for any situation and wielding a dagger to deal with them, she also has an embarrassing side: she often blushes and blames herself if she feels she has made a mistake. She is fiercely protective of Hitoyoshi. In an effort to become an ordinary girl, she does the typical things of an ordinary life and wants to leave her past as a murderer behind, vowing to never kill again.

Because she was told from childhood that she must kill, Yuki acts coldly, but she is also a kind woman. However, when she saves Hitoyoshi from being hit by a truck, Yuki is embarrassed, as she herself notes, because she has never saved anyone like that.