Rei obtained Yukimenoko in a trade. She is a very elegant and refined angel towards everyone, and always handles things in a calm manner. Overtime, she developed a huge crush on Yonowaaru, and occasionally has a hard time trying to hide it. She is usually quiet and will not say much unless matters at hand are important or she is asked a question.

Yuki enjoys reading romance novels, exploring unknown places, painting landscapes, and eating kiwi fruits. Of the few things she hates, she primarily can't stand ignorant people who are rude but think they're the greatest things alive.