Aono’s mother is a woman whose outward cheerfulness and inner strength have been forged through significant personal hardship. In the present, she is characterized by a bright and warm personality, always appearing with a smile and showing no visible signs of the distress that once defined her life. She is deeply supportive of her son, Hajime Aono, and feels a genuine sense of joy and relief that he has returned to playing the violin after a hiatus of approximately one year. Her home is a welcoming place, and she has developed a particularly close bond with Hajime’s classmate, Ritsuko Akine, who frequently visits to practice. She took an immediate liking to Ritsuko, treating her with great fondness and finding that their personalities are highly compatible.

Behind this cheerful exterior lies a history of significant trauma. In the past, her husband, the violinist Ryuji Aono, was involved in an extramarital affair that became a public scandal. The subsequent media frenzy was brutal and relentless, which left her mentally devastated and in a very poor state of health. Following the collapse of her marriage, she became a single mother and took on the sole responsibility of supporting her family, a burden that eventually led to her collapsing from overwork. This period of her life had a profound impact on her son, who was acutely aware of her suffering and, at one point, considered quitting his school orchestra because of the chain of events connected to her illness.

Her role in the story is primarily that of a caring and stable parental figure, providing a nurturing environment for Hajime as he navigates his rekindled passion for music and his complex personal feelings. Her motivations are rooted in her love for her son and her desire to see him happy and healthy, a stark contrast to the difficult years they endured together. While she is aware of her son's past struggles and his consideration of leaving the orchestra, there are significant aspects of his life that remain unknown to her. She is completely unaware of the existence of Nao Saeki, the son born from her former husband's affair, and consequently, she does not know that Hajime and Nao share a complicated relationship as half-brothers, nor that they have confronted each other and grown through that conflict. Her character development is subtly implied rather than explicitly shown; she has transformed from a victim of traumatic circumstances into a resilient, supportive, and seemingly untroubled mother, successfully shielding her son from the weight of her past pain. Her notable ability lies in this very resilience: the quiet strength to rebuild a stable and loving home for her son despite the emotional and physical toll of her past, maintaining a cheerful disposition that belies her struggles.