Fuyumi Hirobe is a 24-year-old artist employed at Blue March, the eroge production company established by Yayoi Aoyagi. She works within the graphics department alongside her friend and colleague, Natsumi Harie.

During voice recording sessions, Fuyumi frequently observes Kanna Aoyagi. She acts as a moderating influence on Natsumi, routinely intervening to restrain her friend's excessive advances toward Kanna or inappropriate expressions of desire. Her role centers on mitigating Natsumi's intense enthusiasm in workplace situations.

Physically, Fuyumi has ochre-colored hair and brown eyes. She stands 1.58 meters tall and weighs 48 kilograms. Her character design reflects a relatively calm demeanor compared to her colleague.