Shirasaki Tsugumi is depicted in a poised, action-ready stance that showcases the figure's hybrid athletic pose. The 1/3 scale statue stands roughly 50 centimeters tall, capturing meticulous details from her flowing hair to the folds of her school uniform. The figure features multiple articulated joints allowing dynamic posing while maintaining a clean silhouette. Her expression blends quiet determination with a hint of curiosity, inviting collectors to imagine a moment of study interrupted by a sudden discovery. Subtle shading and highlight work emphasize fabric texture, ribbons, and accessories, while the base hints at a library theme.

In the Daitoshokan no Hitsujikai universe, Shirasaki Tsugumi emerges as a thoughtful student whose calm presence masks a keen eye for the stories hidden in ordinary places. As a member of the library-focused circle, she navigates routines of study, friendships, and small mysteries that ripple through the campus. Tsugumi is known for her reliability, precise observations, and a quiet courage that surfaces when a book reveals a secret or when a library shelf holds more than meets the eye. Her arc explores themes of knowledge, trust, and the bonds formed through shared quests for meaning.