Tatsuya Ochiai serves as a production assistant at Musashino Animation before accepting a production manager position at Studio Canaan in Episode 7. Tall and lean, he sports short brown-reddish spiky hair and gray-blue eyes, typically dressed in a white shirt, dark turquoise jacket, black pants, and brown boots. His demeanor remains detached and reserved, engaging minimally beyond essential work discussions and displaying emotional neutrality during production meetings. An exception exists in his professional rapport with Erika Yano, a Musashino Animation colleague, with whom he interacts more readily.

Ochiai prioritizes efficiency and task completion, often retreating to solitude rather than socializing. Initially intending to exit the industry after concluding work on *Exodus!* at Musashino Animation, he joins Studio Canaan out of obligation to a former colleague’s request, avoiding potential disappointment to them. This shift transitions him from production assistant duties to a production desk role, though specifics regarding his responsibilities or growth in this position are undefined.

Documented appearances across official media, such as the *Shirobako* movie, acknowledge his presence without expanding on character arcs, personal history, or narrative developments beyond his professional transitions and restrained interactions.