Chise Umenomori is a major supporting character in Mayoi Neko Overrun! She is the wealthy and proud heiress of the Umenomori family and serves as one of the main heroines in the series. Chise is strong-willed, sharp-tongued, and often acts with a tsundere attitude, especially around Takumi and the other girls. Despite her arrogant exterior, she has a caring side and becomes deeply involved in the story’s romantic and comedic conflicts.