The world of One Piece features four main oceans, the Red Line, and most famously, the legendary Grand Line. The Grand Line is a series of islands in a roughly straight line, running perpendicular to the Red Line, and only the strongest and smartest pirates can survive there. Even Don Krieg and his fleet of pirate ships returned from the Grand Line in ragged shape.

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When Monkey D. Luffy arrived at the Grand Line, he visited locations like Little Garden, Water 7, and Thriller Bark, where ordinary pirates would soon be overwhelmed. Survival in that pirate paradise calls for serious combat skills, a loyal crew, and mental fortitude and cleverness to avoid or defeat powerful rivals. Outside the One Piece universe, other anime characters stand out for being true Grand Line material because they're strong enough and practical enough to thrive there.

Pirates and ninjas aren't exactly the same thing, but the smartest and toughest pirates and ninjas still have plenty in common. In Naruto's world, Kakashi Hatake has jutsu on par with many Devil Fruits, and he's a resourceful, crafty, and unpredictable fighter too, like any Grand Line pirate.

Kakashi may not be a sailor, but he could survive on any given Grand Line island like Alabasta or Dressrosa with his formidable jutsu and his practical, clever strategies and insights. Even the Warlords of the Sea would have a tough time catching this strange rogue "pirate."

Vinland Saga has no supernatural elements like magic or haki, but characters like Thorfinn's father Thors are tough enough to make it in One Piece's unforgiving world. If Thors had the potential to learn and use haki, he could even make some progress in the New World.

Thors Snorresson is a peerless fighter, being nicknamed the "Troll of Jom" thanks to his overwhelming strength and durability. Thors is also a diplomatic and wise ex-Viking who knows how to avoid pointless fighting and drive away thugs and bandits without killing them.

Rimuru Tempest stands as one of isekai's most powerful heroes of all time thanks to his unique Predator skill. Throughout That Time I Got Reincarnated as a Slime, Rimuru the slime absorbed other monsters to gain their spells and attributes, and now he's a demon lord as well.

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Rimuru has many Devil Fruit-style powers at his disposal, and his magical strength is overwhelming even by Grand Line standards. Rimuru could easily survive any Grand Line island and convince other like-minded warriors to join him to form a new crew, perhaps called the Slime Pirates.

Tatsumaki is one of only a few One-Punch Man heroes to have actual superpowers and not just martial arts or weapons at her disposal. Tatsumaki, AKA Tornado of Terror, has psychic telekinetic powers on an awesome scale, on par with any Devil Fruit.

Tatsumaki's vast powers would make survival on the Grand Line easy, and she could fly right over any Neptunian-infested waters. She may be taken lightly because of her small stature, but any Grand Line pirate crew would soon learn to respect the tiny Tornado of Terror.

It's true that as a bare-handed martial artist, the 1980s anime hero Kenshiro would struggle against Logia-type Devil Fruit users like Captain Smoker or Ace. Otherwise, though, Fist of the North Star's hero would do well against most typical pirates and raiders found throughout the Grand Line.

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With or without learning haki, Kenshiro can devastate most Grand Line villains and can punch well above his weight with Hokuto Shinken. He can strike pressure points to incapacitate or kill almost anyone, even if they have haki or Devil Fruit powers at their command.

The Grand Line is most favorable for Devil Fruit users, but master swordsmen like Dracule Mihawk can also survive and thrive there. Mihawk can defeat almost any foe with his fearsome black blade and slice icebergs in half, and the same is true of Bleach's Captain Kenpachi Zaraki.

Kenpachi has the combat skills, bloodthirsty, and attitude needed to survive anywhere on the Grand Line, even on Jaya Island and Little Garden. He would soon be seen as Mihawk's true rival, and Mihawk himself might track Kenpachi down to see what all the fuss is about.

Only the strongest and smartest pro heroes and villains from My Hero Academia's world would thrive in the Grand Line as rogue vigilantes or pirate captains. The new #1 hero, Endeavor, could do a lot of good on the Grand Line, defending the innocent from wrathful pirate crews.

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Endeavor is on par with Portgas D. Ace, who was strong enough to roam the Grand Line as a division leader among the Whitebeard Pirates. No doubt Endeavor would make a name for himself blasting villainous pirate crews sky-high with his flaming powers, and the World Government might nominate him as a Warlord before long.

Berserk's rugged antihero, the mercenary Guts, has only ever known war and hardship in his life trekking across Midland. Guts may not have haki or a Devil Fruit, but he boasts immense strength, endurance, and technique that make him a one-man army with his dragon slayer sword.

Guts has the practical street smarts necessary to survive the Grand Line's many islands, and he even has experience sailing on ships. In emergencies, Guts can don his berserker armor and stand up to any Grand Line pirate, though he must be careful to not lose himself in the process.

Erza Scarlet is one of the Fairy Tail guild's strongest and most respected wizards. Like other Fairy Tail heroes, Erza relies on the power of friendship in the toughest fights, but even alone in the Grand Line, she could survive and make a name for herself.

Erza is a self-reliant and down-to-earth swordswoman wizard who can scare off thugs with a glare, and she's charismatic enough to win over new allies by her side. If Erza can't return home, she can form the Scarlet Pirates and rule the Grand Line's rough seas.

Most of the Hashira in Demon Slayer would do fairly well on the Grand Line, most of all Tengen Uzui, the sound Hashira. He's a self-sufficient and stealthy ninja-style slayer who can easily track, stalk, and ambush a target, including the Upper Moons, which gives him the edge.

Tengen is an incredibly deadly fighter, and he can escape any Grand Line foe who's even stronger than he is. Tengen could even sneak aboard a pirate or Navy ship to secure free passage to any other island without anyone even knowing he was ever there.

NEXT: One Piece: 10 Strongest Creatures, Ranked

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10 Anime Characters Who Could Survive One Piece's Grand Line - CBR - Comic Book Resources