Sayaka Kanamori, a tall, lanky high school student at Shibahama High, co-founds the Motion Picture Club. She maintains a consistently deadpan demeanor and pragmatic outlook, lacking innate interest in anime yet recognizing its profit potential. Her appearance features shoulder-length brownish-gray hair, blue eyes, and distinctive upper-rimmed black glasses typically worn on her forehead outside class. She wears the standard school uniform with a teal tie, black knee socks, and brown shoes, occasionally paired with a sneaker backpack.

Driven by a strong entrepreneurial spirit and calculative nature, Kanamori frequently negotiates with teachers and the student council, deploying strategic arguments to secure club resources. This aptitude stems from childhood experiences assisting relatives at their general store, where she learned money's value and witnessed business failures caused by external factors like customer-diverting road construction. Even then, she demonstrated business acumen—advising her relatives to open during snowstorms when competitors closed and clearing snow from a vending machine to attract customers.

As the club's producer and de facto leader, Kanamori manages budgets and timelines. She counterbalances creative members' perfectionism or distraction by enforcing focus and advocating pragmatic compromises, such as animation shortcuts to meet deadlines. Though often exasperated by Midori Asakusa's inattentiveness or Tsubame Mizusaki's artistic demands, she respects their talents and occasionally relents to nurture their creativity. She supports Asakusa's growth as a director despite frequently restraining her imaginative tangents.

Kanamori employs formal honorifics like "-shi" for others, often sarcastically. Her realist worldview openly prioritizes financial sustainability and seizing opportunities—evidenced by recording Asakusa's accidents to potentially sell footage and initiating leaf-collecting ventures for profit. Her backstory includes farsightedness and childhood struggles with mathematics despite overall intelligence.