The villagers of Konoha would have a mixed reaction. Some of the older villagers who are more set in their ways might be a bit wary. However, the younger generation would likely be more open - minded. They might see Harry as an opportunity to learn new things and expand their worldviews. Harry might also become a sort of inspiration for the young ninjas, showing them that there are different kinds of power and abilities out there beyond what they already know in Konoha.
The kids in Konoha like Naruto would probably be very excited. They love new and different things, and Harry with his magic would be really cool to them.
The younger characters like Konohamaru might be extremely excited and see Harry as a new idol. They'd be eager to learn about his magic. The more experienced ninjas, such as Kakashi, would be cautious at first, trying to figure out if Harry's presence is a threat or an opportunity.
Her magic would probably be seen as something very strange and powerful. The ninja in Konoha are used to chakra - based abilities, so her spells and potions would be completely new to them. Some might be in awe of her magic, while others might be a bit scared, thinking it could be a threat.
Sasuke might be more reserved at first. He'd be cautious and might see her as a potential threat or distraction. But as he gets to know her, he could come to respect her abilities. As for Sakura, she might be a bit jealous at first, seeing a new girl with such unique powers, but then they could become friends as she realizes Fem Harry Potter is not a rival for Sasuke's attention. And the Hokage would likely be very interested in how her magic could benefit Konoha.
Sasuke might be more understanding. Given his own experiences of leaving Konoha, he could respect Naruto's decision. However, he might also secretly plan to keep an eye on Naruto from afar to make sure he is safe.
Well, he might introduce magic from the wizarding world to the ninjas. For example, he could show them spells like Wingardium Leviosa and they might be amazed at how different it is from their chakra - based jutsu.
Sakura would probably be very worried. She has always cared about Naruto deep down, so she might be constantly trying to find a way to bring him back. Kakashi, on the other hand, would likely understand Naruto's reasons to some extent. He might be sad but also respect Naruto's decision. As for Sasuke, if he is in the village at the time, he could be conflicted. He and Naruto have a complex relationship, and Naruto's leaving might make him realize how much Naruto actually means to him.
He'd have to adapt his magic to fit in. Maybe he'd learn to use it more discreetly, as ninjas are all about stealth. He'd also need to get used to the ninja hierarchy and respect the local rules.
The older generation, like Tsunade, would be horrified. They've seen Konoha through many hardships and would not want to see it destroyed. They would likely mobilize all available forces to stop Naruto and the Kyuubi. Meanwhile, Naruto's friends like Shikamaru and Choji would be in shock. They've always known Naruto as a kind - hearted and loyal friend, and this sudden turn would be very difficult for them to accept. They might initially be in denial and then try to find a way to stop Naruto without harming him.
He might use his magic skills to stand out. For example, his ability to perform spells could be seen as a unique talent in Konoha. His shop could become a place where ninjas are curious to visit and learn about different kinds of magic.
Well, the plot could involve her arriving in Konoha and being mistaken for a strange new ninja. She might use her magic in unexpected ways that both amaze and confuse the Konoha residents. Maybe she teams up with Naruto and his friends to fight against a new threat that is both magical and ninja - related.