Mother narrates her family's daily life as the central parental figure raising three daughters. Her perspective stems directly from Pretz Matsumoto's semi-autobiographical manga blog, established in 2005, which grounds her character's experiences. She uses the pen name "Purritsu"; her real name and her husband's identity are undisclosed.
Her characterization reflects the realities of parenting young children, balancing patience with occasional temper flare-ups amid household chaos. The narrative centers on her interactions with each daughter's distinct personality: Fu's imaginative tendencies and self-appointed role as eldest sister, Su's independent unpredictability, and Chii's demanding nature as a toddler with limited verbal skills. These dynamics drive much of the series' situational comedy and challenges.
Her development across media consistently portrays a mother navigating early childhood. The 2019 movie reintroduces her years after the original anime, incorporating modern elements like smartphones while readapting earlier blog stories. A crossover manga with "Kaasan - Mom's Life" further explores her family interactions when the two households meet, reinforcing her established role within domestic narratives. Her background and experiences continuously draw from Matsumoto's child-rearing blog, maintaining the character's foundation in observational humor and familial relationships throughout all official adaptations.