Ume Matsuzaka teaches the Rose Class at Futaba Kindergarten. She cultivates a stylish public persona but faces private financial hardship, living in a cheap apartment and subsisting on budget foods like noodles and lettuce when money runs short before payday. Dissatisfied with her given name due to its associations with meanings like "low class" or "third rate," she frequently insists others avoid using it. Though she expresses frustration with Futaba Kindergarten and contemplates transferring to more prestigious schools, underlying loyalty surfaces when she rejects job offers requiring her to mock the institution. Her romantic history includes an initial relationship with Kawaguchi, followed by a significant one with Tokuro Gyouda. Tokuro's death in a terrorist attack while working in South America profoundly affected her, leading to a period of depression and suicidal thoughts. She later developed feelings for Shingo Kakeda. She has two sisters named Matsu and Take. Physically attractive with a fit physique and appealing facial features, Ume also possesses acrobatic abilities, including performing flips—a skill honed through dance classes. Her personality blends assertiveness and occasional harshness with genuine care, particularly evident in her complex friendship with fellow teacher Midori Ishizaka. Despite frequent bickering, Ume assists Midori in reconciling with her future husband, Junichi Ishizaka. A recurring comedic element involves Shin-chan and his friends disrupting her dates. In "Crayon Shin-chan: Explosion! The Hot Spring's Feel Good Final Battle," Ume appears as a supporting character during the Nohara family's involvement in a conflict between two organizations battling over Japan's hot springs. Her portrayal in this film remains consistent with her established traits and relationships from the series.