Kotake Sakura is the paternal grandmother of the protagonist Momoko Sakura, widely known as Maruko. She is the mother of Hiroshi Sakura, the mother-in-law of Sumire Sakura, and the wife of Tomozo Sakura, and is also the grandmother of Maruko's older sister Sakiko. Her personality is defined by exceptional warmth, kindness, and a gentle nature. She is depicted as an ideal grandmother figure, a good-natured individual who is deeply loved and respected by everyone in her family. In contrast to her husband Tomozo, who is sentimental and easily distracted, Kotake is grounded and realistic, providing a practical and stabilizing influence in the Sakura household. Her primary motivation is the well-being and happiness of her family. She finds her purpose in nurturing her children and grandchildren and maintaining a peaceful and harmonious home environment. In the narrative, Kotake serves as the stabilizing matriarch of the family. Her quiet yet constant presence reinforces the warmth and structure of Maruko's world. Her key relationships highlight her role as the family's emotional and practical anchor: her balanced dynamic with her husband Tomozo, her loving bond with her son Hiroshi, her respectful relationship with her daughter-in-law Sumire, and her deep, unconditional love for her granddaughters Maruko and Sakiko. Because the series operates in a continuous setting, Kotake does not experience a dramatic character arc. Her development is expressed through her consistently reliable nature and the enduring support she provides. Her notable abilities are not extraordinary in a flashy sense but are the profound qualities of patience, unconditional kindness, and quiet strength. These traits allow her to gently guide her family and overcome the everyday challenges of life.