Usui Yukihi

A half-breed born from a Yuki-onna and a human.
Since she has human blood in her veins, she has not been miniaturized unlike other demons.
She attends school and hides her demon identity so that exorcists do not become aware of her.

She is an arrogant character that lives for her own whims, and toying with people is her reason to live.
A beautiful girl with a bewitching aura on her at all times, she has captured the heart of the boys in the school with her seductive smile.
Because of this, many boys have tried to ask her out, but Yukihi has no interest in them:
with words that pierce their hearts with deadly accuracy, they all have fallen.
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From MangaGamer