Naruto's character would also develop relationships with the One Piece characters. He would bond with Luffy over their shared sense of adventure and loyalty to their friends. His ocean - controlling powers would make him a valuable ally to the Straw Hat Pirates. He might start to dress more like a pirate or incorporate One Piece - style elements into his appearance. His personality would still retain his Naruto - like exuberance and determination, but would also be shaped by the new experiences and challenges in the One Piece world.
His character could develop by learning new skills unique to the game. For example, if the game has a magic system, Naruto might learn to combine his chakra with magic spells. This would expand his combat abilities.
Naruto's character would likely develop a strong sense of adventure. In the One Piece world, there are so many islands to explore and mysteries to uncover. He'd be eager to find out about the One Piece itself. His determination to be recognized would also take on a new form. Instead of being recognized as a great ninja in Konoha, he'd want to be known as a great figure in the One Piece universe, maybe as a hero who helps the oppressed. His loyalty would still be a big part of his character, and he'd form strong bonds with the friends he makes during his travels.
At first, Naruto would probably be excited about his new ability to control Grimm. He loves to show off his skills in the original series, and this would be no different. But as he gets deeper into it, he'd face challenges. For example, some Grimm might be more resistant to his control. This would force him to be more patient and strategic, which would be a new side of his character. He might also start to empathize more with the Grimm, understanding that they are just products of their world, much like how he understood the villains in his own world after learning their backstories.
In some fanfictions, it could be related to an ancient bloodline limit that was dormant in Naruto all along. His Uzumaki heritage might have some connection to water - related powers, and through some sort of emotional or physical trigger, he is able to access and control the ocean.
As Naruto controls headcrabs, he could develop a more complex view of the world. He'd see that there are different kinds of power sources and ways to interact with living beings. This might lead him to question some of the traditional ninja teachings. He could start to advocate for a more inclusive approach in the ninja world, one that doesn't immediately view strange or dangerous creatures as enemies but rather as potential allies or tools that can be controlled and used for good. His relationships with other characters could also change. Some might be afraid of his new power, while others might be intrigued and want to learn from him.
Naruto's self - confidence could grow even more. Controlling scorpions gives him an additional skill set in his ninja arsenal. This could lead him to take on more challenging missions and face stronger opponents. He would learn to adapt his fighting style to incorporate the scorpions, which would require him to be more strategic and patient, further developing his character.
His character would likely become more adaptable. In the One Piece world, there are so many different races and cultures. Naruto, being a curious person, would learn a lot from them. This would make him more open - minded and less naive. His goal - setting might change. Instead of aiming for Hokage, he could aim to be a great pirate or help liberate oppressed islands. His relationships would also be different. He'd form bonds with pirates, Marines (if he could), and various islanders.
Naruto's outgoing personality would mean he'd quickly make friends with all the members of the One Piece crew. His ability to see the good in people, like how he saw the good in Gaara, would help him understand and get along with characters in One Piece who might seem rough on the outside, like Sanji. He would also bring his own brand of leadership. While Luffy is the captain, Naruto could inspire the crew in different ways, perhaps by sharing his own tales of growth and perseverance, which could give the crew new perspectives on their own quests.
Peter could be developed as a strict but loving father. He might set high standards for Scott, pushing him to be the best he can be. For example, in school or in his use of any special abilities. This would show his determination to see Scott succeed.
Naruto's ninjutsu skills could be very powerful in the One Piece world. His Rasengan, for instance, is a concentrated ball of chakra. In the One Piece world, it could be as strong as some of the more powerful Devil Fruit attacks. His ability to run up walls and trees using chakra control could also be useful in the more diverse terrains of the One Piece world, like running up the side of a ship or a rocky island.