Tamako greatly resembled her son in appearance. She had slightly long messy light color hair that was a different shade at the top. She wore the Restaurant Yukihira cooking uniform and an apron around her waist. Like her son, she would wear a white headband around her forehead when she cooked and usually kept it loosely tied around her neck when she wasn't.
Tamako was the daughter of a diner chef. In spite of that, she was a horrendous cook, and was infamous among patrons of her family's restaurant for her "Chef's Special". While originally somewhat of a delinquent in her youth, Tamako mellowed out following high school. Tamako met her future husband, Jōichirō Saiba, when the latter first came to the restaurant. The two did not see eye to eye at first: Jōichirō was revolted by her cooking, while Tamako was annoyed by Jōichirō's increasing presence at the restaurant. However, the two grew closer: Tamako accepted Jōichirō after acknowledging his talent, while Jōichirō found his passion for cooking rekindled by Tamako's warmth and genuine care for her customers. Eventually, they married, becoming parents to a son they named Sōma. At Jōichirō's request, Tamako kept her husband's past and work overseas a secret from their son.
When Sōma was approximately twelve years old, Tamako suddenly developed a heart problem, specifically complications stemming from a heart valve defect. She died from complications about a month later.
Tamako was a lot like her son; she was optimistic, cheerful and sociable, making her quite popular despite her terrible cooking. She never let her failure bring her down and always tried to learn from her mistakes. Both her husband and son greatly admired this trait about her, with the former being impressed that she was capable of coming up with ideas which he could not fathom.
- Tamako (珠子), using the kanji for "Jewel" or "Gem" (珠 Tama) and "child" (子 Ko). Yukihira (幸平), using the kanji for "blessing" (幸 Yuki) and "common" or "ordinary" (平 Hira), could translate as "blessing of the ordinary".