Lilly Mistin, known in the original Japanese version as Ranko Kasumi, is a supporting character in the anime Kasumin. She is the only daughter of the Kasumi family and lives with them after her divorce. She is described as a beautiful young woman who, despite being a weirdling, appears the most human-like among the members of her unusual family. Her role in the story is that of a major side character, and she appears primarily in the third season of the series. Her relationships center on her family, particularly the other Kasumi household members. Information about her personal motivations, character development, or any notable abilities is not documented in available sources.