(白雪 みぞれ, Shirayuki Mizore)

Voiced by: Rie Kugimiya

Mizore Shirayuki is a yuki onna. Keeping in line with Japanese mythological creatures, she has the ability to control the element of ice at will, and can form clones composed of said element. Frequently seen with a lollipop in her mouth (yuki onna are vulnerable to warm climates; doing so keeps their bodies cool and let them melt ), Mizore returns to school after a delayed absence and shows an immediate interest in Tsukune. In truth, she becomes infatuated with him, going so far as to create her own journal/scrapbook with all of his newspaper articles. In the past, she confessed her love to a teacher until he began taking advantage of her, with the result that she froze him. With the incident and rumors spreading about her, Mizore made it hard for herself to trust anyone, but took a liking to Tsukune, believing he was just as miserable as she was. She eventually regains her sense of trust after Tsukune intervenes when the same teacher returns to kill her. Unfortunately, this leads Mizore to stalk Tsukune on a daily basis.

A running gag in the series is that Mizore always appears unexpectedly in the oddest locations (under tables, behind doors, the ceiling, bushes, even in the bathroom), and throws ice-based projectiles to disrupt any sort of tender moment Tsukune is having with any other girl. Mizore's mother is Tsurara Shirayuki, who appears during the start of the school festival under the belief that Tsukune is her daughter's boyfriend, while her unnamed father appears in the second anime adaptation.