Chisa Tsukamoto, a diligent 16-year-old student, plays a key role in her family’s printing shop, specializing in doujinshi materials for client projects. With her parents owning the establishment, she oversees operations during their absences, though her occasional clumsiness and distractibility result in mishaps like misprinted orders or equipment mishandling. A recurring visual motif depicts her sprinting after runaway carts overloaded with materials, encapsulating her tenacity amid persistent mishaps.

In the anime continuity, she shares classrooms with the protagonist as a junior, though her academic pursuits remain largely unexplored. Her narrative centers on supporting the "Brother 2" doujinshi circle by navigating printing deadlines despite sporadic errors, maintaining unwavering enthusiasm that highlights her dedication to both the craft and its creators.

Documented background notes list her birthdate as February 22 and blood type A, alongside participation in the 2005 Anime Saimoe Tournament without specified context. Her portrayal remains consistently focused on her role as a supportive yet occasionally error-prone pillar within the doujinshi production chain across all documented media, absent of expanded backstory or significant evolution in spin-offs or supplementary works.