Monkey D. Luffy captains the Straw Hat Pirates during the non-canonical adventure "One Piece: Nejimaki Shima no Bōken" (Clockwork Island Adventure). His carefree and impulsive personality manifests when he fixates on a toy windmill during a beach respite, enabling the Trump Pirates to steal the crew’s ship, the Going Merry, alongside their possessions and weapons. Forced into makeshift clothing and a crude paddleboat, Luffy’s group encounters the self-proclaimed Thief Brothers, Akisu and Borodo, falling victim to their deception via a fishing net trap. Luffy retains his standard pre-timeskip appearance: average height with a slim muscular build, shaggy black hair, round black eyes, and his signature yellow straw hat secured by a string strap. He wears a red vest, light blue denim shorts, and sandals, displaying the scar under his left eye—self-inflicted in childhood to demonstrate toughness to pirates. His combat relies entirely on the Gum-Gum Fruit’s elastic properties, enabling ranged attacks like the Gum-Gum Pistol. Like all Devil Fruit users, full submersion in water weakens and immobilizes him. Learning the Trump Pirates, commanded by Bear King, operate from Clockwork Island, Luffy allies with the Thief Brothers despite their initial antagonism. Driven to recover his ship and protect his crew, he leads the assault on the island’s spiral staircase. There, he uses his rubber body to shield allies from trap mechanisms like collapsing floors and water surges while Sanji and Roronoa Zoro handle immediate threats. Luffy’s loyalty intensifies when Nami is kidnapped to become Bear King’s bride and later when Sanji, Usopp, and Zoro are crucified. His typically cheerful demeanor shifts to serious aggression during confrontations with Trump lieutenants Honey Queen, Boo Jack, and Skunk One. Witnessing Zoro sacrifice himself to absorb paralyzing darts meant for him during a pressure-trap encounter, Luffy grows enraged by his crew’s suffering. Inspired by Borodo’s dedication to freeing Akisu’s potential homeland, he breaks through multiple castle floors upon seeing the repaired windmill—a symbol of the Thief Brothers’ bond—to confront Bear King directly. The conflict culminates with Luffy thwarting Bear King’s King Cannon superweapon from firing upon the captured Straw Hats and Nami. His intervention stops Borodo’s suicidal attack, which would have damaged the island’s central engine. Victory returns the Going Merry and the Diamond Clock, though Luffy’s focus remains solely on his crew’s safety. Throughout the ordeal, his actions reflect core traits: immense physical resilience, straightforward problem-solving, unwavering optimism in dire situations, and an instinctive ability to inspire others through action. He consistently prioritizes his crew’s well-being, risking himself to ensure their survival.