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).
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.
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.
Draco's Slytherin friends would be quite shocked. Some might shun him, thinking he's betraying the Slytherin ideals. However, a few might see the advantage of having a connection to Harry Potter. For example, if there are any threats to Slytherin as a whole, Harry's influence could be useful. So there would be a split in how Draco's Slytherin friends react.
Harry might be initially skeptical. He has a history with Draco, so he'd be worried for Ginny. But over time, if he sees how happy Draco makes Ginny, he could come around. Hermione would probably be more open - minded. She'd look at Draco's character development and judge based on that. Ron, on the other hand, would be the most difficult. He'd be very protective of Ginny and would likely grumble a lot at first.
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.
Pikachu, Ash's main Pokémon, would be very confused. It's used to Ash's mannerisms and commands. When Serena is in Ash's body, Pikachu might not respond as well at first. It might keep looking at 'Ash' quizzically, wondering why he's acting so strange. Serena's Pokémon, like Braixen, might also be confused. They might sense that something is off with 'Serena' (Ash in her body) and be a bit hesitant to follow commands as usual.
In these fanfictions, Harry may develop a more diplomatic side to his personality. Since Draco is from Slytherin and has a different way of thinking, Harry has to learn to negotiate and find middle ground. For Draco, his friendship with Harry can make him more empathetic. He might start to care about the well - being of others outside of his Slytherin clique, like the Gryffindors and other Hogwarts students, which is a big change from his initial self - centered attitude.
I really like 'The Unexpected Swap'. In this fanfiction, when Draco and Hermione switch bodies, it leads to some interesting interactions with their friends. For example, Harry and Ron are completely bewildered by 'Hermione' (who is actually Draco) acting so out of character. Also, the author does a great job of showing how Draco starts to see Hermione's world in a new light while in her body, and vice versa. It's a really engaging read.
Well, it's really interesting. When Draco and Hermione switch bodies, it's not just about the physical change. Their relationship is affected on multiple levels. Emotionally, they start to empathize with each other. Intellectually, they learn from the way the other approaches problems. Socially, they see how the other is treated in their respective social circles. All these factors combined lead to a significant shift in their relationship. For instance, in some stories, this experience makes them realize that their previous animosity was based on misunderstandings, and they begin to work towards a more positive relationship.
The Weasley twins would likely make light of the situation at first. They might crack some jokes to ease the tension. But they would also use their own experiences to tell Harry and Ron that fighting over small things isn't worth it and that they should patch things up quickly.