The Akaza Ichiban Kuji C Prize figure captures a dynamic and imposing presence faithful to the Gekijouban Kimetsu no Yaiba: Mugen Ressha-hen design. The sculpture emphasizes precise facial features that convey Akaza's cold, confident demeanor, with sharp sculpting on his eyes and distinctive demonic markings. The flowing kimono is rendered with layered pleats and a sense of motion, accentuated by subtle shading that enhances depth. Base and stand are compact yet sturdy, and paintwork highlights the character's color palette to resemble the film's aesthetics, ensuring a striking display on shelves or detents.

Akaza, known as Upper Moon Three, is a former human martial artist named Hakuji who transformed into a demon. He seeks worthy opponents to satisfy his pride in combat and to push his own limits, often clashing with Demon Slayers who rival his strength. In the film, he embodies a calm, almost aristocratic demeanor beneath a dangerous ruthlessness, channeling his fighting spirit into precise, devastating techniques. His appearance reflects his rank and power, while his backstory provides contrast between his former humanity and current, merciless demon nature, adding depth to the series' mythos.