Sanji, originally named Vinsmoke Sanji, is the third son and fourth child of the Germa Kingdom's ruling Vinsmoke family. His father, Judge, genetically engineered his children to be emotionless super-soldiers, but Sanji's mother Sora intervened, preserving his humanity at the cost of her health. Lacking superhuman abilities, Sanji endured severe abuse from his brothers and rejection by his father, who imprisoned him and staged his death. His sister Reiju helped him escape Germa during an expedition to the East Blue, where he renounced his title and family permanently. After fleeing, Sanji worked as a cook on the cruise ship Orbit until the pirate "Red Leg" Zeff attacked it. A storm destroyed both vessels, stranding Sanji and Zeff on a barren rock with scarce food. Zeff gave Sanji all the rations, secretly surviving by eating his own leg. This sacrifice forged a deep bond, leading Sanji to vow never to refuse food to the hungry. Rescued and taken to Zeff's floating restaurant, the Baratie, Sanji trained as a sous-chef for nine years. Under Zeff's mentorship, he mastered culinary arts, developed his "Black Leg Style" kick-based martial arts to protect his hands for cooking, and adopted a strict chivalric code forbidding harming women. Sanji joined the Straw Hat Pirates after Monkey D. Luffy defended the Baratie from Don Krieg. His dream is to find the All Blue, a legendary sea where fish from all four oceans converge. As the crew's cook, he combines exceptional culinary resourcefulness with combat prowess, ranking among the top fighters alongside Luffy and Zoro as the "Monster Trio." Sanji maintains composure in crises but exhibits comedic extremes when enamored by women or provoked by crewmates like Zoro. His intelligence and tactical acumen often lead to covert operations; during the Skypiea Arc, he deduced the island's link to the City of Gold, endured Enel's lightning to protect Nami and Usopp, and later destroyed Enel's Ark Maxim internally. Sanji's chivalry dictates his actions: he refuses to fight women, even when overpowered by Kalifa at Enies Lobby. His loyalty to the crew is absolute, exemplified when he offered his life to Kuma on Thriller Bark in exchange for Luffy's. After the timeskip, trained in the Kamabakka Kingdom, he learned "Sky Walk" aerial mobility and mastered 99 "Attack Cuisine" recipes to enhance physical strength. His past resurfaced in the Whole Cake Island Arc when his family forcibly arranged his marriage to Charlotte Pudding to ally with Big Mom. Despite initial attraction, Sanji rejected the union after discovering Pudding's assassination plot. The arc forced him to confront his trauma and self-worth, culminating in Luffy reaffirming his place in the crew. There, he showcased his culinary genius by perfectly recreating a wedding cake under duress, pacifying Big Mom. In Wano, Sanji grappled with using his family's Raid Suit, which enhanced his abilities but symbolized his rejected heritage. Repeated use awakened latent genetic modifications, granting him superhuman durability, speed, and regeneration. He accepted these powers as his own, developing "Ifrit Jambe," a blue-flame technique combining his enhancements with Armament Haki. During the Onigashima Raid, he defeated Queen despite moral conflicts, notably calling for Robin's help against Black Maria to uphold his code. Sanji's bounty reflects his growth: initially 77,000,000 Berries for Enies Lobby, it rose to 177,000,000 (with an "Only Alive" stipulation due to his family's influence) after Dressrosa, then 330,000,000 after escaping Whole Cake Island. Post-Onigashima, it reached 1,032,000,000 Berries. Throughout his journey, Sanji balances his compassionate core—feeding enemies, protecting the weak—with the resilience forged by his past, embodying the ethos that "a cook's hands must never be harmed."