Skunk One operates as a major antagonist within the Trump Siblings pirates during the Clockwork Island conflict. He wears a helmet marked "1" and goggles, sporting a brown pilot-style shirt. A fur-covered jetpack with a rear thruster completes his look. Hidden beneath the helmet are slick black hair, parted to the side, and pointed ears. His personality bursts with wild energy, frequently punctuating speech with "gas!" He displays a cruel playfulness, relishing the chase of foes like Usopp yet recoiling in fright when confronted by an angry Nami. Ironically, despite wielding foul-smelling gas as a weapon, he exhibits extreme intolerance to strong odors himself, gagging violently when hit by Usopp's rotten egg. His jetpack is his primary weapon, spewing paralyzing Devil Gas that incapacitates opponents while granting him aerial mobility. This ability proves key during battles against the Straw Hat Pirates inside Trump Castle. Within the film's events, Skunk One participates in Nami's kidnapping for Bear King. He later ambushes the Straw Hats in the castle plaza, using his gas to paralyze them while displaying a captured Sanji. Usopp sacrifices himself by blocking the gas nozzle, allowing the crew to advance. After crucifying Usopp and restraining Nami, Skunk One rejoins the escalating island battle. He pursues Usopp again after an explosion frees the captives, only to be tricked by Usopp's feigned fear. Lured close, he takes a point-blank Kaen Boshi (Flame Star) shot directly into his gas launcher. The resulting explosion propels him away, trailing black smoke. His final fate is unresolved, caught in Clockwork Island's destruction following Bear King's defeat. Conceptually, Skunk One embodies the Trump Siblings' motif, merging an animal (skunk) with a playing card reference (Ace, signified by the helmet's "1"). The documented materials show no canonical appearances or developments beyond this film.