This is a Canon character.
Mizore ShirayukiEditMizore Shirayuki is one of the main characters in Rosario + Vampire. She's known to be the shy stalker of the group, often appearing out of no-where, appearing to have been watching the group. Mizore does appear to be quite cute, but has a strange way of, well, basically many things. Mizore has also not seemed to care when her skirt is blown up or when danger is occuring, as she didn't show any sign of Fear. She has a lollipop in her mouth to keep her cool in warm climates. If she doesn't, she'll "melt".
*Hat Professor is a the Dark Pentagram created by Me Terrin Auh!