Monkey D. Luffy captains the Straw Hat Pirates, hailing from Dawn Island in the East Blue. His lineage includes grandfather Monkey D. Garp, a Marine vice-admiral, and father Monkey D. Dragon, commander of the Revolutionary Army. Raised under Garp and Curly Dadan’s supervision, Luffy forged brotherly oaths with Portgas D. Ace and Sabo. The pirate "Red-Haired" Shanks profoundly influenced his youth, igniting Luffy’s dream to become Pirate King. After accidentally ingesting the Gum-Gum Devil Fruit—later unveiled as the Human-Human Fruit, Model: Nika—Luffy gained rubber-like elasticity but lost the ability to swim. Shanks entrusted him with a straw hat as a reunion pledge, inspiring the name of Luffy’s crew. Physically, Luffy sports shaggy black hair, round black eyes, and a lean muscular frame. Distinctive traits include his yellow straw hat with a red band and a scar beneath his left eye—self-inflicted to prove bravery to Shanks. The Summit War of Marineford left an X-shaped scar across his chest. His typical outfit is a red vest, light blue shorts, and sandals, though he modifies attire for environments like deserts or tundras. Luffy’s personality blends audacious fearlessness, unshakable self-confidence, and minimal common sense. He swings between childlike extremes: voraciously pursuing food or adventure yet sacrificing everything for friends. Cowardice and betrayal repel him, but he honors those battling their limits. Guided by instinct, he defends allies and challenges oppression, ignoring repercussions. This draws ire from global powers like the World Government and Fleet Admiral Sakazuki. Ace’s death at Marineford plunged Luffy into catatonic despair and self-loathing. Jinbe’s intervention and Rayleigh’s mentorship restored his resolve, leading to two years of training focused on his crew. Post-timeskip, Luffy mastered all Haki forms and refined his Devil Fruit powers. Its awakening exposed its true identity as the Human-Human Fruit, Model: Nika—tying him to the Sun God myth and the legend of Joy Boy. Reuniting with his crew during the Fish-Man Island Saga, Luffy journeyed to the undersea kingdom. He protected Princess Shirahoshi from assassin Vander Decken IX and clashed with Hody Jones of the New Fish-Man Pirates, who plotted to overthrow the monarchy and ignite interspecies war. Luffy neutralized 10,000 fish-man soldiers using Conqueror’s Haki and battled Hody to save the island. Dismissing Jinbe’s warnings about inflaming tensions, he declared his motives purely personal. His crew’s intervention crushed Hody’s coup, earning Luffy hero status on Fish-Man Island—where children emulated his straw hat—and he claimed the island under his protection. Luffy leads through instinctive loyalty, recruiting crewmates for vital roles while demanding unwavering trust. His actions reshape global power structures: defeating Kaidou elevated him to the Four Emperors. He commands the Straw Hat Grand Fleet’s 5,600 pirates and governs territories like Fish-Man Island and Wano Country.