Well, Sasuke might initially be angry. He and Naruto have a deep bond, and Naruto leaving Konoha for another village could seem like a break in that connection. Sakura would be heartbroken. She's always cared about Naruto, and seeing him go would be difficult for her. As for the others, like Kiba and Choji, they might feel like they've lost an important part of their team. They would wonder if there was something they could have done to keep Naruto in Konoha. However, over time, they might come to accept his decision if they see that he's happy in the new village.
However, there could also be some who are skeptical or even a bit wary. After all, Naruto is an outsider. They might worry that he has ulterior motives or that his presence could disrupt the village's way of life. But over time, as they get to know Naruto better, these doubts might fade away.
His other friends from Camp Half - Blood would have mixed reactions. Some would be proud of him for wanting to serve and protect in a different way. Others might think he's crazy for leaving the world of demigods and getting involved in mortal military affairs. They know he has a duty to the demigod community, and joining the military could put that in jeopardy. But overall, they would support him because they know Percy always follows his heart and they trust his judgment.
His friends would likely have a mix of reactions. Some, like Pikachu, would be right by his side and excited for the new adventure. Others, like his human friends, might be a bit sad at first because he'd be spending more time with the Elite Four duties. But overall, they'd be proud of him. They know how hard he's worked to get to this point in his Pokémon training journey. And they'd also be looking forward to seeing how he'd change the Elite Four with his unique style.
His relationships would become more complex. He'd have to start from scratch with new people. Some might be friendly right away, while others could be hostile.
In a more welcoming village, the villagers could be excited to have him. They might see him as a hero because of his reputation in the ninja world. They would ask him for stories about his battles and adventures, and Naruto would be happy to share, creating a friendly and positive atmosphere.
Sakura would probably be very angry at Kurenai. She's protective of Naruto and would demand an explanation. She might even try to heal Naruto right away if it was a physical injury.
Sakura would be furious. She's always been protective of Naruto in the original Naruto series. In the RWBY fanfiction, she would probably start her own investigation to find out who was behind the betrayal. She might even challenge the RWBY characters if she thought they were involved. Kakashi, on the other hand, would be more calm and collected. He would try to analyze the situation rationally and figure out the best way to help Naruto.
Sakura might be initially surprised but would probably be supportive. She has always cared about Naruto's happiness, so as long as he is happy with the elf, she would be okay. Kakashi, on the other hand, would likely be intrigued. He's seen a lot in his life, but an elf - ninja union would be something new. He might offer some sage advice based on his own experiences with different cultures.
Sakura would be very worried. She has always cared about Naruto, even if she sometimes gets annoyed with his antics. She would probably try to find him right away, thinking that he's in some kind of trouble.
Choji would be sad and also a bit scared. He has always been a loyal friend to Naruto. He might not be as aggressive in trying to stop Naruto as some of the others, but he would try to reason with him, talking about their friendship and how the village has also been a home to Naruto. And Ino would use her mind - related jutsu to try to break any possible mental influence on Naruto if there is one, while also trying to reach out to him emotionally.