Naruto's friends in the Hidden Leaf would be really confused if Harry showed up. They'd wonder why he doesn't know basic ninja stuff. Harry's friends at Hogwarts would be equally baffled by Naruto. Hermione might try to study Naruto like he's a new magical creature. Ron would probably be a bit more hesitant around Naruto at first.
Their other friends in Gryffindor would be quite shocked. Neville, for instance, might stutter and not know how to react. Luna might have a more calm and accepting reaction. She might say something like 'This is a very interesting turn of events. I wonder what the magical cause could be?' The Weasley family would be especially confused. Molly Weasley might be worried about Ginny's well - being and Arthur Weasley would be trying to figure out how such a strange magical occurrence could have taken place.
There's a chance he'd be inspired. The stories of the Naruto characters' determination and growth in the fanfiction could stir something in him. He might think about his own journey as a wizard and how he can further develop his skills and character, taking cues from the Naruto characters' tenacity.
Ron would probably be really confused at first. He might think it's some kind of elaborate prank by Fred at first, but when he realizes it's something more serious, he'd be worried. Harry would be more level - headed and try to figure out how to help them switch back. Ginny might find the whole situation quite funny, especially seeing Hermione in Fred's body trying to act like a boy. She might give her some tips on how to fit in better as a male Gryffindor.
Harry's friends would be extremely confused at first. Hermione might suspect something is wrong right away and start investigating. Ron, on the other hand, might be more straightforward and just think Harry has gone a bit strange. The Gryffindors might be suspicious of 'Harry' (really Draco) acting differently. For Draco's friends, they would also notice the change. Crabbe and Goyle might not be smart enough to figure it out immediately, but Pansy might sense that something is off with 'Draco' (really Harry).
Naruto, if in Sasuke's shoes, would inherit Sasuke's goal of revenge against Itachi and later, those who were involved in the Uchiha massacre. His life would be centered around getting strong enough to exact justice. Sasuke, in Naruto's place, would focus on the well - being of the village. He'd want to show that he was more than just a powerful ninja, but also a reliable protector. He'd work towards building relationships with the villagers and would be more open to the idea of becoming Hokage, which was Naruto's original aspiration.
At first, his friends would be shocked. Hermione might think it's some kind of dark magic at first glance. But as Harry shows them what he can do, she would start to analyze it scientifically. Ron would be more awed. He'd be like a kid seeing a new cool trick. They would both support Harry in exploring this new ability, but also be a bit cautious as they don't fully understand where it comes from or what the implications are in their wizarding world.
His friends would be very surprised. Hermione would probably be a bit skeptical at first. She'd want to research all about Witchers before she fully supported Harry's new interest. Ron, on the other hand, might be more excited. He'd see it as another adventure and would be eager to hear all about the Witcher world from Harry.
Ron would probably be both shocked and a bit awestruck at first. He might make some typical Ron - like jokes to ease the tension, like 'Blimey, Harry, you're a dragon! At least you'll be good for scaring off Snape now!'. But deep down, he'd be worried and determined to help Harry get back to normal.
His friends would be quite shocked. Neville might be a bit scared at first, thinking it's some new dark magic. But then they'd all come together. Ginny would probably be the one to try and comfort 'cat - Harry' by giving him some fish or milk, thinking that's what cats like. And they'd all be determined to get him back to normal as soon as possible.
Luna would likely have a very unique reaction. She might say that the fanfiction is just another form of magic in the world of imagination. She could tell Harry that he should embrace it in a way, as it shows how much people are interested in his story, even if it is a bit mortifying at first. But she would also respect if he was really bothered by it.