Well, for Naruto and Sasuke, their relationship might become even stronger earlier. In the past, they could train together more and understand each other's pain from the start. Sakura might be more assertive in her relationship with Sasuke, as she has the knowledge of what will happen in the future. She could try to prevent Sasuke from going down a dark path right from the beginning. And among the other members of Konoha 12, they might form closer bonds as they rely on each other more in this strange new situation of being in the past.
The relationships would change in many ways. Kiba, for example, might become closer to Akamaru in a different way, as they would be in a new and challenging environment in the past. Neji could be less bitter as he sees a new opportunity to change the future of his clan. Tenten might form new friendships as she has a chance to interact with past - era shinobi. And the relationships between the boys and girls in Konoha 12 could be more fluid. They would be more likely to see each other as equals in this difficult situation of being in the past, rather than just classmates or friends from the present - day village.
If the Konoha 12 go back in time, their relationships would be greatly altered. Shikamaru, who is usually laid - back, might become more of a leader figure among them in the past. His intelligence could be crucial in guiding the group. Choji and Ino might have a different dynamic as well. Ino could be less competitive with Sakura as she realizes the importance of unity in this time - travel situation. And Hinata might be more confident around Naruto, knowing how important he will become. Overall, they would all have to work together in a new way, which would reshape their relationships.
His relationship with Kakashi would also change. Naruto could use his Rinnegan - enhanced knowledge to help Kakashi deal with his past traumas earlier. He might also show Kakashi new jutsu or ways of combat that he learned in the future. This would make Kakashi see Naruto in a whole new light and their bond could become more of a teacher - student relationship in reverse.
With his Slytherin peers, Draco's relationship would shift. He might encourage them to be more inclusive and less focused on pure - blood supremacy. This could make him an outcast among some of the more traditional Slytherins, but also gain him new allies who are open to change.
His relationship with his father, Ned Stark, would be different. He could finally have a real father - son relationship instead of the hidden one. He might be able to learn from Ned and become an even better leader in the North.
His relationship with Katara would be very different. He might be able to approach her in a more confident way, knowing what they've been through in the future. He could also avoid some of the misunderstandings that happened between them in the original timeline.
Link's relationship with his own past self could be a really interesting aspect. If he meets his younger self, there could be a sense of mentoring or even confusion. His younger self might not understand what's going on at first. And when it comes to friends like the Koroks, if he goes back to a time when the Korok Forest was in a different state, their interactions would be new and different. The overall web of relationships would be completely reshaped as he steps into a different time period in Hyrule's history.
Regarding his relationships with his friends and comrades, like Samwell Tarly, things would be altered. He might not meet Sam in the same way as before. And his relationship with Daenerys Targaryen could be completely different. Instead of meeting her during the events of the original story, he could meet her when she was much younger, and this could lead to a very different kind of relationship, maybe one that's more of a mentorship or a completely different romantic connection.
His relationship with Sasuke would be very different. If Naruto stops the Uchiha massacre, Sasuke may not have the intense hatred he had in the original story. They could grow up as friends without the need for Naruto to constantly chase after Sasuke to bring him back.
His relationship with Iruka sensei would be very different. As an old Naruto, he would be more of an equal to Iruka rather than a student. He could share his life experiences and wisdom with Iruka, and they might develop a more peer - like friendship.
If Kakashi goes back in time, his relationship with Rin would be complex. He might try to protect her more, which could lead to a different dynamic between them. He would be more aware of the threats she faces and could be more proactive in her safety. With Guy, he could be a better friend from the start. He could join Guy in his challenges and competitions more often, strengthening their rivalry - friendship. And when it comes to the Third Hokage, Kakashi could offer more insights based on his future knowledge. This might make the Third Hokage rely on him more, and Kakashi could become a more important figure in the village at an earlier stage.
His relationship with his former sensei, Iruka, would be really interesting. Naruto could go back and show Iruka how much he has achieved, which would be a really heartwarming moment. And with Kakashi, he could share his experiences as Hokage and maybe even learn some new things from Kakashi in the past.