Shizuka's mother, known as Mrs. Minamoto, frequently appears in the Doraemon series. She is a kind and affectionate woman who warmly greets Shizuka's friends, including Nobita Nobi. When Nobita visits, she often tells him Shizuka is away at the library, market, or attending piano or violin classes, sometimes adding that Shizuka is with their classmate Dekisugi.

An episode hints her name might be Michiko, recalling her gift of the novel "Long Legged Gentleman" to Tamako Nobi before she moved away during their youth.

Her background includes being a successful high school violinist, where she started dating her future husband, Yoshio Minamoto. At that time, she bore a strong resemblance to her daughter Shizuka and was friends with Tamako Nobi. She is the daughter of an artist, who is therefore Shizuka's maternal grandfather and Yoshio Minamoto's father-in-law.

Mrs. Minamoto excels at cooking, inspiring Shizuka to learn culinary skills. Her visual design differs between anime versions: the 1979 anime depicts her with dark brown hair in a bun and black eyes, while the 2005 version gives her black hair, dark eyes, and slightly longer hair.