In the One Piece world, Jasmine Potter could face many challenges. The World Government might see her as a threat due to her unorthodox powers. Pirates might also try to capture her to use her magic for their own gain. However, with her intelligence and magical skills, she could form alliances with different factions in the One Piece world, like the revolutionary army, and fight against the common enemies.
She might use her magical abilities in unique ways. For example, her spells could be adapted to combat the various Devil Fruit users. Maybe she could create spells to counter the Logia type's intangibility, like a spell that freezes the area around them, preventing them from turning into their elemental forms.
She would start as an outsider, but gradually adapt to the unique culture of the One Piece world. Her sense of justice, which she has from her own world, would be put to the test. For instance, she might have to decide whether to support pirates like the Straw Hats who are more like Robin Hood figures, or oppose all pirates as she might have been taught in her original world.
If Naruto were in the One Piece world, he could form interesting alliances. He might team up with Luffy and the Straw Hats. Naruto's ability to make friends easily would fit right in with the Straw Hat crew's spirit. His Rasengan could be a very powerful attack against some of the strong foes in the One Piece world. Also, his experience with dealing with different types of enemies in his own world would give him an edge in strategizing in the new and strange world of One Piece.
Well, she might be really confused at first. The magic in the Harry Potter world is quite different from the powers in One Piece. She could try to use her spells, but they might not work as expected. Maybe she'd meet Luffy and his crew, and they'd be really curious about her strange clothes and the wand she carries.
Well, he might start by being really confused. The Devil Fruits would be so strange to him compared to chakra. He could probably make friends with Luffy easily though, since they both have that adventurous spirit. And his ninja skills could come in handy when fighting pirates. Maybe he'd teach some of the Straw Hats some cool ninja moves.
If the One Piece characters watched fanfiction, they might be really confused at first. For example, Luffy might not understand why there are stories about him that are so different from his real adventures. Some of them could be amused, like Chopper seeing cute versions of himself in some fanfictions. But others might be offended if the fanfiction portrays them in a bad way. Zoro might get angry if he's shown as being weak in a fan - made story.
If Naruto was born in the One Piece world, he would probably be a very unique individual. His ninja skills like shadow clones could be a huge asset. Maybe he'd join a pirate crew and use his skills to fight against the Marines or other pirates. His determination to be recognized, similar to his goal in the Naruto world, would likely drive him to achieve great things in the One Piece universe as well.
If One Piece characters watch the future fanfiction, there would be a whole range of reactions. Sanji might be curious about his future relationships, especially with Nami and Robin. The villains might also get a look at their potential downfall or their rise to greater power. This could potentially disrupt the current storylines as the characters start to make different decisions based on what they've seen in the fanfiction.
They might be really confused at first. The world of One Piece is so different from their own universe. The concepts like Devil Fruits and the Grand Line would seem very strange to them.
Well, it could lead to some really chaotic and interesting scenarios. Characters in Naruto might start using Devil Fruits powers. For example, a character could have the power of the Gomu Gomu no Mi and stretch their limbs like Luffy during battles in the Naruto world. This would completely change the dynamics of combat as the ninja skills in Naruto are mainly based on chakra and jutsus, and adding One Piece powers would be a wild mix.
Naruto would probably befriend Harry Potter and his friends easily. He has a very friendly and outgoing personality. He could teach them about chakra and how it's different from magic. And in return, the Hogwarts students could show him all the cool spells and magical creatures. It would be a really interesting cultural exchange of sorts between the ninja world and the wizarding world.