Mizore Yukihiro is a supporting character in UQ Holder. She is the great-granddaughter of Ayaka Yukihiro and the heir to the Yukihiro Conglomerate, a position that comes with considerable wealth and social standing. She appears as a young girl with hip-length blonde hair that she wears in twintails. Her personality is initially presented as shy and reserved, but she also shows a determined and capable side when necessary. She is motivated by a strong romantic interest in the protagonist, Touta Konoe, and promptly announces her intention to make him her husband upon meeting him. At the same time, she is perceptive enough to recognize that Touta comes from a line of heartbreakers, calling him a menace to all women. Her role in the story is limited to a short but notable appearance: she arrives at the UQ Holder base during a visit by her ancestor Ayaka. Her direct involvement in the main conflict is minimal, and her story arc is largely defined by her romantic pursuit of Touta and her status as a member of an influential family. Key relationships include her bond with Ayaka Yukihiro, her ancestor, and her brief interactions with Touta. Development is not extensively explored; her fate following a major time skip is unknown, with some indications that she may not have survived. Notable abilities are not detailed in the available sources, and she does not display any supernatural powers or combat skills in the series.