His relationship with Sasuke would be very different. In the new dimension, Sasuke might not have the same vendetta against his brother. So Naruto wouldn't have to worry about Sasuke going off the rails. With Sakura, she could be a powerful ninja in a different way, like she might be more focused on medical ninjutsu and Naruto would see her in a new light. And his relationship with Kakashi could change too. Maybe Kakashi is a strict military - like leader in the other dimension instead of a laid - back teacher.
Naruto's relationships would change significantly. In the new dimension, he may find that his friends are now his enemies or vice versa. His friendship with Kiba, for example. Kiba could be part of a group that is against Naruto's arrival in the new dimension. On the other hand, Naruto might meet a new character who becomes his closest ally, someone who understands his situation of being from another dimension. His relationship with the Hokage in the new dimension would be complex. If the Hokage is more power - hungry, Naruto would have to oppose him, which is different from his relationship with the Hokage in his own dimension.
If Naruto travels to another dimension, his relationship with his friends would be transformed. For instance, his bond with Shikamaru. In the new dimension, Shikamaru could be a lazy king instead of a lazy ninja. Naruto would have to adjust to this new Shikamaru and their relationship would be based on different dynamics. His relationship with Hinata might also change. Hinata could be a confident and outgoing ninja in this dimension, and Naruto would be attracted to her in a different way than in his own dimension. Also, Naruto's relationship with the village elders would be different. They might see him as a threat instead of a hero in this new dimension.
Well, Naruto's relationship with the villagers would be quite different. Instead of being the outcast he was as a child, he could use his knowledge of the future to show his worth early on. This might lead to more positive interactions with the villagers. And his relationship with his friends like Shikamaru and Choji could also be enhanced as he could introduce more interesting things to them at an earlier stage.
If Merlin travels back in time, his relationship with Arthur would be very different. In the past, Arthur might not trust him at all at first. Merlin would have to prove himself all over again. With Gwen, he might be more aware of her future importance and try to protect her in a different way. And his relationship with the other knights could be completely new, as they might see him as a stranger with strange powers.
If Naruto were not human, his relationships would likely be very different. For example, his relationship with Sasuke might be more strained. Sasuke, who is very focused on power and revenge, might see Naruto as a greater threat if he's not human. He could view Naruto's non - human abilities as something to envy or fear. With Sakura, she might be more hesitant around Naruto. Instead of her initial crush, she could be more cautious, not knowing what Naruto is truly capable of.
With Sakura, she might be initially afraid of Naruto's demon form. But as she realizes that Naruto is still the same person inside, she could become more protective of him and help him control his powers. Their friendship could deepen in a different way compared to the original story.
If Ianto travels back in time, his relationships with the Torchwood team in his original time would be put on hold. They would be left wondering where he went. In the past, he might form new relationships. For example, he could become friends with an ancestor of one of his present - day colleagues. This would create a strange connection between the past and the present for the team when he eventually returns.
His relationship with his father Poseidon would be different. He might see a side of Poseidon that he never knew before, like when Poseidon was younger and less experienced. This could change how Percy views his father and their connection.
With the other Robins, like Dick Grayson and Jason Todd, his relationships would vary. If he was from a more violent universe, he might not get along with Dick's more positive and acrobatic approach. And he could have a more competitive or even hostile relationship with Jason if they were both vying for the same territory or resources in Gotham.
His relationship with Sasuke would be really interesting. Since Sasuke has his own complex connection to the Uchiha clan and Madara, Naruto becoming a Madara fan could either bring them closer together in understanding the Uchiha's past or drive them further apart if Sasuke doesn't agree with Naruto's new - found admiration. Maybe Naruto would start to push Sasuke towards a more 'Madara - like' view of power and revenge.
His relationship with Sasuke would likely become more strained. Since Naruto is forced to be a ninja, Sasuke might see him as being part of the system that he resents. Naruto's friends like Sakura would also be worried about him. They might try to find a way to free Naruto from whatever is forcing him to be a ninja. His relationship with his teachers, like Kakashi, would also change. Kakashi might be conflicted between following the rules that are forcing Naruto and protecting Naruto from harm.
His relationship with Sakura would change a lot. Sakura might be initially scared of Naruto's fox form, but as she realizes it's still him inside, she would start to see him in a new light. She could become more protective of him. With Kakashi, Kakashi would be more cautious and observant, trying to figure out how to help Naruto control his new form. And with his rivals, they might either be more envious or more afraid of him now that he has this unique transformation.