Sasamoto teaches the GA-3 class and advises the Fine Arts club at Ayanoi Academy. Tomboyish in appearance, she possesses a stoic and reserved personality, preferring quiet work. Her initial motivation for advising the Fine Arts club was solely to gain unrestricted access to the club room for personal use. Consequently, she shows minimal responsibility, frequently skipping club sessions to smoke and displaying little overt interest in its activities. Club members call her "Tono-sensei".

She also advises the School Life Environment Club. Due to insufficient membership, this club merges with the Fine Arts club. The merger happens because the Environment Club cannot disband; it provides essential campus cleaning volunteer services, and Sasamoto exploits this to maintain a designated smoking space. Her real name is revealed as Kanoto Sasamoto in the illustration book "GA Geijutsuka Art Design Works Core Curriculum".

When the Fine Arts club faces disbandment due to low membership, Sasamoto actively intervenes despite her typical detachment. She persuades Mizubuchi, the sole member of the Environment Club, to join the merged club, ensuring its survival. This action reveals a latent dedication to her students, contrasting her usual indifference. She remains largely unaware of student achievements unless colleagues inform her, such as when a student receives an art award. Despite apparent apathy, she works diligently to impart knowledge and support her pupils' development.

Her professional demeanor lacks overt enthusiasm compared to other faculty, yet she maintains a consistent presence. No significant evolution in her role or personality occurs beyond these events; her actions continue to reflect a balance between detachment and underlying commitment to the school's operational needs.