Mayuki is a supporting character in the 2000 OVA Koihime. She is one of four young women from the protagonist Musashi Sasaki’s childhood whom he reunites with upon returning to his hometown. In contrast to her friends Anzu, Nami, and Suzaku, Mayuki is notably reserved and withdrawn. She often seeks solitude and appears uncertain or uncomfortable around others. Her appearance is striking: a tall young woman with long black hair, red lips, and unusually pale, almost transparent skin that allows her to blend into snowy landscapes. This supernatural quality, along with her tendency to appear on snowy nights, suggests a connection to the yuki-onna (snow woman) legend. Mayuki’s role in the story is that of a rekindled childhood acquaintance who becomes part of the harem surrounding Musashi. Her motivations are not explicitly detailed, but her reclusive nature and supernatural aspect imply a hidden past that gradually unfolds as the protagonist reconnects with her. Her key relationships are with Musashi and the other three childhood friends, and her development likely involves opening up to others and confronting her otherworldly origins. No specific combat or supernatural abilities are clearly described outside of her snow‑associated presence.