It would also impact his relationship with his village. The village has always seen Naruto as a part of their heritage in a way, especially considering his connection to the Fourth Hokage. If he rejects his heritage, some villagers might feel betrayed or confused.
Well, it could strengthen his bond with some characters. For example, he might feel a closer connection to his clan members if he discovers his heritage. He could also gain new respect from his peers who now see him in a different light, perhaps as a more important figure within the village due to his lineage.
Well, it could strengthen his bonds. His friends might see him in a new light, with more understanding and respect. For example, they could realize the weight of his past and be more empathetic towards his struggles.
One possible reason could be the burden that comes with his heritage. Naruto's heritage is filled with great power and responsibility. Maybe he feels that he can't live up to the expectations of his clan or predecessors, so he rejects it.
In the fanfiction, when Naruto learns of his heritage, he often becomes more confident. Knowing where he comes from gives him a sense of purpose. He might start to train harder, believing that he has a greater destiny due to his lineage.
His relationship with Sasuke could be affected in a big way. Sasuke is very much tied to his clan, and Naruto's rejection might make Sasuke view him differently. It could either create a rift between them or make Sasuke question his own loyalty to his clan. As for his friends like Sakura, she might be initially shocked but then try to understand Naruto's perspective.
In fanfiction, when Naruto's heritage is revealed during the Chunin Exams, it can have a huge impact on his relationships. His teachers, like Kakashi, might start to train him differently, realizing his true potential. His friends, such as Sakura and Shikamaru, could be more protective of him. However, some of his classmates who were jealous before might now try to isolate him. Also, ninja from other villages might approach him differently, either trying to recruit him or seeing him as a greater threat.
He might feel angry and frustrated. Naruto has always been proud of his potential and his roots in some way. Being denied his heritage would be like taking away a part of his identity, so he'd likely be quite mad at those who are doing the denying.
Naruto's neglect of his heritage can have a profound impact on the overarching theme of the fanfiction. If heritage represents a sense of identity and purpose in the Naruto universe, his neglect means he's sort of adrift. This can change the story from a typical 'coming - of - age - with - heritage' type to a more 'finding - oneself - despite - neglecting - heritage' plot. It could also lead to new character developments as he encounters different cultures or powers that make him reevaluate his decision to neglect his heritage.
He might start seeing himself as part of a greater legacy. Knowing he's an Uzumaki could make him feel more powerful and connected to his roots. He could see that his strength isn't just his own, but part of a family trait.
Maybe he's been influenced by someone who has a different view of heritage. For example, if he meets a character who believes that one should create their own identity rather than relying on heritage, Naruto could be swayed. Another possibility is that he has some sort of resentment towards his heritage. Perhaps there are things in his family's past or in the traditions associated with his heritage that he doesn't agree with or is ashamed of.