His relationships would become really complex. The other male characters like Shikamaru might be a bit more awkward around 'female' Naruto at first. They were used to the old Naruto. But as time goes on, they might start to accept this new version. And with the female characters, some might be more empathetic towards Naruto's new situation, while others could be jealous of the attention she gets in her new form.
Well, his relationships would change a great deal. His male friends might start seeing him in a different light, perhaps being more protective or having a different kind of friendship dynamic. For example, Sasuke might be initially confused but then feel a stronger need to keep this 'new' Naruto safe. And with Sakura, they could develop a more sisterly bond rather than the previous somewhat competitive one.
With the teachers, like Dumbledore, he might be treated differently. Dumbledore might see this transformation as an opportunity for Harry to learn new things about the wizarding world from a different perspective. And some of the more traditional teachers might have different expectations of Harry's behavior in class now that he is a girl.
His relationship with his sensei, like Kakashi, could become more complex. Kakashi would feel guilty for not being able to protect Naruto from the experiments. And Naruto might start to question Kakashi's ability to keep him safe. This could lead to a strain in their relationship at first, but later they could grow closer as Kakashi helps Naruto recover from the trauma of the experiments.
It could improve his relationship with Sasuke. Since Chidori was Sasuke's signature move for a long time, Naruto learning it might show Sasuke that Naruto respects his skills and is willing to incorporate them into his own fighting style. This could lead to a more positive and equal relationship between them. Also, Kakashi might see Naruto in a new light. He trained Sasuke in Chidori, and seeing Naruto master it too could make him realize Naruto's determination and growth even more.
With his friends in Konoha, they would be worried and perhaps a bit afraid. They know Orochimaru's reputation as a villain. Naruto's friends like Shikamaru might start to keep a closer eye on him, which Naruto could resent. He would feel like they don't trust him anymore, and this could strain their friendships.
If Naruto has a physical disability like a broken arm that doesn't heal properly in fanfiction, his friends like Sasuke and Sakura would need to step in and help him more. Sasuke might be more protective, which could change their dynamic from a competitive one to a more collaborative one. Sakura could use her medical skills to try and find a way to heal him, which would bring them closer. His relationship with his teachers, like Kakashi, would also change as they'd have to adjust their training methods.
Well, it might make his relationships more complex. His friends could be both curious and a bit wary at first. For example, Sasuke might see him as even more of an oddity, which could either drive them further apart or make Sasuke more protective in a strange way. Sakura might be more motherly towards him, trying to take care of him because of his new features.
It could have a mixed impact. Some characters may be intimidated. Naruto's usual friendly and boisterous nature is replaced with Zabuza - like traits. Those who were close to him, like Iruka, would be worried. They would try to reach out to him to understand why he has changed. His relationships with the villagers could also take a hit. Since Zabuza was an outsider and a bit of a threat in their eyes, Naruto acting like him might make the villagers less trusting. However, some of the more battle - hungry ninjas in the village might see him as a stronger and more interesting ally now.
His relationship with Sasuke could change significantly. Sasuke might see Naruto's newfound ability as a threat or, on the other hand, it could be a motivation for him to get stronger. Naruto might use the Hiraishin no Jutsu to try and keep an eye on Sasuke, which could either annoy Sasuke or make him secretly respect Naruto's determination.
Enemies would definitely be more cautious around Naruto. Those who once underestimated him would now fear his golden chakra. This could lead to some enemies trying to find weaknesses in it. Meanwhile, Naruto's new power might also attract the attention of mysterious characters who want to guide him in using it, which could cause some friction with his existing relationships as he has to decide who to trust.
His friends would be extremely worried. Sakura, for instance, would likely try to use her medical skills to help him and also try to figure out why he's doing it. She might be angry at first for him harming himself but then become very concerned. His relationship with Sasuke could also change. Sasuke might see Naruto's self - harm as a sign of weakness or, on the other hand, it could make him more empathetic towards Naruto as he has his own inner demons.