Yukimin is Himuro's younger sister, sharing his descent from a Yuki-onna snow spirit. This heritage grants her ice-based abilities, triggering involuntary snow or cold manifestations during intense emotions. She possesses long silver-white hair resembling Himuro's and distinctive lavender eyes, both traits of their supernatural lineage. Her name, incorporating "yuki" for snow, directly reflects her ice powers. Personality contrasts sharply with her brother: she is outgoing, emotionally expressive, and unreserved, openly declaring affection like telling Fuyutsuki "I love you" without hesitation. Himuro views her as an "annoying younger sibling," underscoring their dynamic. Her character development revolves around familial bonds, frequently visiting Himuro and his colleagues to engage in their social activities. She displays curiosity about her brother's personal life, particularly his romantic interest in Fuyutsuki, and often playfully teases or provokes him during interactions.