Luffy is the cheerful, rubber-powered captain and founder of the Straw Hat Pirates who dreams of finding the legendary One Piece and becoming the Pirate King to achieve ultimate freedom.

Roronoa Zoro, popularly known as "Pirate Hunter" Zoro, is the formidable first mate and combatant of the Straw Hat Pirates. Zoro is a fiercely loyal, stoic, and muscular warrior distinguished by his cropped green hair, sharp features, and a collection of battle scars—most notably a prominent scar running down his left eye and another across his chest from his legendary duel with Dracule Mihawk. He is famous for pioneering Three Sword Style (Santoryu), a unique and devastating martial art where he wields two swords in his hands and a third tightly gripped in his mouth. Driven by a childhood promise to his late friend Kuina, Zoro's ultimate, unshakeable ambition is to defeat Mihawk and become the World's Strongest Swordsman. Despite his intimidating demeanor, deep voice, and terrible sense of direction—which frequently serves as comic relief as he gets lost on even straight paths—Zoro possesses a profound sense of honor, deep tactical intelligence in battle, and an ironclad devotion to his captain, Monkey D. Luffy, often acting as the stern voice of reason that holds the crew together through the perilous trials of the Grand Line.

Nami, also known by her epithet "Cat Burglar," is the brilliant and fiercely independent navigator of the Straw Hat Pirates. Initially introduced as a highly cynical, gold-obsessed thief who deeply detested pirates due to a tragic past, it is later revealed that she spent her childhood stealing treasure to buy back her occupied hometown, Cocoyasi Village, from the tyrannical fishman pirate Arlong. After Monkey D. Luffy and his crew defeat Arlong and liberate her family, Nami permanently joins the Straw Hats as their third official member, dedicating herself to her lifelong dream of drawing a complete map of the entire world. Known for her signature orange hair, a pinwheel-and-mikan shoulder tattoo, and an unmatched, almost supernatural ability to predict erratic weather patterns, she serves as the logistical backbone and pragmatic voice of reason on the ship. Though she often plays the comedic straight-woman who scolds her crewmates for their reckless antics, Nami possesses an incredibly deep well of empathy, loyalty, and bravery, using her intelligence and her weather-manipulating weapon, the Clima-Tact, to hold her own against formidable enemies across the Grand Line. J cups, and usually wears bikinis, or skirts with no panties underneath.

Nico Robin, also known by her epithet "Devil Child," is the archaeologist of the Straw Hat Pirates. Standing as one of the narrative's most intellectually vital characters, she is the only known person alive capable of reading Poneglyphs, ancient stone conduits that detail the world's hidden "Void History" and provide the coordinates to the legendary island of Laugh Tale. Physically distinguished by her tall, elegant stature, dark hair, and striking eyes, Robin possesses the powers of the Hana Hana no Mi (Flower-Flower Fruit), a Paramecia-type Devil Fruit that allows her to sprout duplicates of her limbs and body parts on any surface within her sight. Her life was defined by profound tragedy from the age of eight, when the World Government executed a Buster Call that completely annihilated her homeland of Ohara, leaving her a traumatized fugitive with a massive 79 million Berries bounty as a mere child. Forced into a life of survival and betrayal among criminal syndicates—most notably serving as the Vice President "Miss All Sunday" of Baroque Works—she initially joined Monkey D. Luffy’s crew out of convenience but grew to find her true family among them. Her character arc reaches an emotional peak during the Enies Lobby arc, where she famously sheds her internal burden and cries out her desire to live, transforming from a guarded, stoic survivalist into a deeply loyal, warm, and morbidly humorous pillar of the Straw Hat crew. I cups.

Sanji, also known as "Black Leg" Sanji, is the official cook of the Straw Hat Pirates and one of the most powerful combatants. Born as a prince of the scientifically advanced Germa Kingdom, Sanji rejected his abusive family and his genetically engineered lineage to pursue his passion for culinary arts, eventually training under the pirate-turned-chef Zeff at the Baratie. Instantly recognizable by his slicked-back blonde hair covering one eye, his curly eyebrows, and his sharp, formal suits, Sanji adheres strictly to a rigid personal code: he fights exclusively using his legs to protect his hands for cooking, and he absolute refuses to ever harm a woman. In battle, his devastating, fire-infused kicking style—known as Diable Jambe and later Ifrit Jambe—makes him part of the crew's "Monster Trio" alongside Luffy and Zoro. Despite his comical, over-the-top obsession with women, Sanji is a deeply chivalrous, tactical, and compassionate individual who dreams of finding the All Blue, a legendary ocean where wildlife from all four seas coexist.

Chopper is the lovable, blue-nosed reindeer and doctor of the Straw Hat Pirates in One Piece. After eating the Human-Human Fruit, he gained the ability to transform and speak. Though often mistaken for the crew's pet due to his cuteness.