Shuuko Komi, born Nimi Shuuko, is the wife of Masayoshi Komi and mother to Shouko and Shousuke Komi. Within the Komi family household, she acts as the primary communicator, compensating for the shared communication difficulties of her husband and children. She closely resembles her daughter Shouko, sometimes causing confusion between them. Shuuko has neck-length dark purple/black hair parted on the left, full pink lips, and perpetually wears a smile, a stark contrast to her family's usual stoicism. This contributes to her striking beauty, drawing attention much like her children.
Her personality is extremely outgoing, bubbly, and talkative, directly opposing her family's reserved nature. She handles nearly all verbal interactions for the household. Her entrance often shifts the mood of a scene. Shuuko exhibits a playful and romantic side, enjoying recreating moments from her daughter's relationship with Hitohito Tadano. She identifies as "Forever 17," a trait humorously reflected in visible aging when distressed. She openly expresses deep love for her family, though her enthusiasm sometimes embarrasses Shouko around friends. Despite this, she shows situational awareness by withdrawing to give Shouko social space. During her adolescence, Shuuko displayed a "Kuudere" personality—cold, blunt, and emotionless on the outside while caring underneath—before evolving into her current extroverted self through interactions with Masayoshi.
Orphaned as a child, Shuuko was raised by her grandmother. In her third year of high school, her grandmother also passed away, leaving her completely alone. Her then-boyfriend Masayoshi proposed marriage during this isolation, providing emotional stability. Before marriage, she expressed boredom with school and initially dismissed Masayoshi, but gradually fell for him after observing his exceptional, near-professional skills in various activities, despite his silent and deadpan nature. Her maiden name "Nimi" combines "new" (新) and "see" (見), meaning "new view," while her married name "Komi" combines "old" (古) and "see" (見), meaning "old view." Her given name "Shuuko" means "excellent child" (秀子), reflecting her transition from past to present.
In the family dynamic, Shuuko actively bridges communication gaps. She frequently expresses curiosity about how her silent family members interact without extensive words. Her interactions with Masayoshi fundamentally transformed her personality from a reserved teenager to her current expressive self. Her role highlights adaptability and the central influence of familial bonds on her character.