Manga

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Monkey D. LuffyA rubber-bodied kid who wants to be Pirate King, no matter how little sense that makes

Luffy ate a cursed fruit as a child that turned his body to rubber at the cost of never being able to swim, a huge liability for someone who wants to sail the world as a pirate. His simple, unwavering goals, freedom, adventure, protecting his crew, never get more complicated than that, and the story treats that simplicity as a genuine strength rather than something he needs to grow out of.

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Roronoa ZoroA bounty-hunting swordsman chasing a promise made to a dead friend

Zoro trained alongside a childhood rival who died before either of them could settle which was the stronger swordsman, and his entire goal, becoming the world's greatest swordsman, is really a way of honoring that unfinished promise. His terrible sense of direction is the story's reliable running joke against his otherwise unshakeable competence.

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NamiA thief with her own tragic history with pirates, navigating toward a goal of her own

Nami grew up under a pirate's cruel rule and spent years stealing from pirates to buy her village's freedom, which makes her initial distrust of Luffy's crew, and her eventual real loyalty to them, land with genuine weight once her backstory comes out.

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UsoppA compulsive liar forced to find out which of his tall tales he can actually live up to

Usopp tells constant exaggerated stories about his own bravery, and the story repeatedly puts him in situations where he has to decide whether to run from danger or actually become the brave sniper he's always pretended to be.

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SanjiA chivalrous chef who fights with his legs to keep his hands safe for cooking

Sanji survived near-starvation as a child thanks to a mentor who taught him that no one should ever be denied food, a conviction that shapes both his cooking and his near-absolute refusal to hit women in a fight, even dangerous ones.