Monkey D. Luffy captains the Straw Hat Pirates. His body gained rubber-like properties from consuming the Gomu Gomu no Mi Devil Fruit, granting immunity to electricity and most blunt forces but vulnerability to sharp objects. This immunity proves critical during Skypiea confrontations. Luffy typically wears an open red vest, light blue denim shorts, sandals, and his signature straw hat—a gift from "Red-Haired" Shanks symbolizing his promise to become a great pirate. In the Skypiea Arc, he adds a black wristband on his left wrist with a white bangle over it, accessories lent by Usopp and Sanji.
Luffy exhibits a carefree, adventurous personality with strong disregard for authority and self-proclaimed deities. Arriving in Skypiea via the Knock-Up Stream, he ignores demands to pay an entrance fee at Heaven's Gate, resulting in his crew being branded criminals. Learning about the forbidden Upper Yard sparks his immediate interest, and he insists on exploring it despite warnings about the cruel ruling "god" Enel. Luffy prioritizes protecting his crew and allies, attacking White Beret enforcers after they assault Nami over fee disputes. He remains unfazed by displays of Enel's power, like sky-splitting energy beams, and continues undeterred into Upper Yard.
His combat style leverages rubber elasticity for attacks like Gomu Gomu no Pistol. In Skypiea, he faces Enel's priests and their "Mantra" (Observation Haki) abilities. During the Ordeal of Balls, Luffy, Sanji, and Usopp battle the priest Satori, overcoming his mind-reading by turning his tactics against him. Luffy later confronts Enel directly, using his rubber body to nullify Enel's lightning-based powers. This culminates in ringing the golden bell of Shandora, fulfilling a 400-year-old promise tied to Montblanc Noland's tale and ending the war between Skypieans and Shandians.
Luffy shows respect for cultural symbols and history. He rings the golden bell to validate Noland's legacy and signal Cricket, Noland's descendant, that the lost city of gold exists in the sky. He retrieves a large amount of gold from Upper Yard, which Nami later uses to fund the crew's travels. His actions inadvertently resolve the land conflict between Skypieans and Shandians by defeating Enel.
Luffy's background as the grandson of Marine hero Monkey D. Garp and son of Revolutionary leader Monkey D. Dragon informs his defiance of oppressive systems. This is evident in his rejection of Skypiea's punitive laws and his direct challenge to Enel's tyrannical rule. His loyalty extends beyond his crew; he assists Gan Fall, the previous ruler, and the Shandia warriors when their goals align against Enel.
Throughout the Skypiea conflict, Luffy displays intuitive leadership, rallying allies like Gan Fall and the Shandians. He remains focused on adventure and treasure, declaring the crew's intent to "steal all the gold" from the lost city. His unwavering determination and unique abilities position him as a pivotal force in dismantling Skypiea's oppressive hierarchy.