One of the main heroines of Tsukihime. In this series, her tsundere personality is exaggerated, with her "angry" stage represented by her hair turning red, a reference to her demonic heritage. The "Phantasmoon" segments portray her as the villain and nemesis of Arcueid, although her "evil" plots are merely good deeds like feeding stray dogs or drawing a manga.

The typical "tsundere little sister"-type.