Boss appears as a supporting character in *Mazinger Z vs. Devilman*. He forms a trio known as "Boss, Mucha and Nuke," classmates and close associates of Koji Kabuto at the Photon Power Laboratory.

During the film's events, Boss is present at the laboratory when the demons Bugo and Sirène attack to destroy the newly developed Jet Scrander. Sirène captures Boss along with Sayaka Yumi and Shiro Kabuto. Devilman rescues the hostages after Sirène releases them mid-air.

Characterized as a loyal friend, Boss provides occasional comedic moments through his interactions. He maintains close relationships with Koji, Shiro, and other Photon Power Laboratory team members. His role centers on the Jet Scrander attack and subsequent rescue.