Tsugumi Shirasaki is one of the main characters in the anime series 'Daitoshokan no Hitsujikai'. She is a cheerful and kind-hearted student at Shiomi Academy, where she plays a pivotal role in the Library Club. Tsugumi is known for her optimism and determination, often encouraging her friends to strive for their goals. Her involvement with the mysterious Shepherd adds a layer of intrigue to her character. Throughout the series, Tsugumi's interactions with the protagonist, Kyoutarou Kakei, uncover deeper themes of friendship, ambition, and the pursuit of happiness within the context of their school life.