Paru, also known as Pal, operates as a mysterious art dealer in the medieval kingdom of Artoria within *Eiga Doraemon: Nobita no Esekai Monogatari*. He masquerades as a local figure eager to acquire valuable artworks, especially those containing the rare Artoria Blue pigment. His deep knowledge of historical art and Artoria's affairs attracts Doraemon and Nobita's group during their investigation into stolen paintings.
Paru's true identity is revealed as an undercover agent of the Time Patrol, a future law enforcement agency safeguarding temporal integrity. He was engaged in a temporal pursuit of the thief Sodro when their confrontation fractured a historical artwork. One fragment accidentally fell into Nobita's present-day room due to Sodro's actions during the chase. Paru's mission focuses on capturing Sodro and preventing the misuse of future technology in the past.
During the film's events, Paru aids Doraemon and Nobita in thwarting Sodro's schemes, which involve a human-impersonator robot posing as Princess Claire and the orchestrated release of the demonic entity Isere from a painting. Paru's expertise and resources become vital in countering these threats. He is temporarily petrified by Isere during the final conflict but is later restored. In the resolution, he locates and rescues the original ten-year-old Claire from a spacetime anomaly, reuniting her with her family in Artoria while ensuring the timeline's stability.
His actions directly shape the film's conclusion, where the altered historical painting—now depicting Paru, Doraemon, and others—is discovered in the modern era, reflecting his role in reshaping Artoria's history.