Well, his relationship with the new generation of ninjas would be quite different. They might see him as a more mysterious figure with his red hair. The younger ninjas could be in awe of him or some might be a bit scared. Naruto would have to work harder to gain their trust and respect. His relationship with the village elders would also be strained as they might suspect something dangerous about his transformation, but Naruto would strive to prove that he is still the same hero at heart, just with a new look.
His relationship with Hinata might be different. She could be initially taken aback by his new look but then come to love him all the same. His friends like Shikamaru and Kiba might tease him more about his red hair, creating a new dynamic in their friendships. And his relationship with his son, Boruto, could also change as Boruto might have a different perception of his father with this new appearance.
One possible plot could be that Naruto's appearance change to having red hair is a result of some new form or power he has acquired in the future. Maybe it's related to a new type of chakra or a special training he underwent. This new look might make his enemies underestimate or overestimate him, leading to interesting battles and strategic situations.
The relationship between Cersei and Naruto would be complex. Cersei, being a power - hungry character, might try to use Naruto's abilities for her own gain. But Naruto, with his good - natured self, would resist if her plans were unjust. His relationship with Jaime could also be interesting. Jaime might see Naruto as a strange addition to the family but also might respect his skills. And with other characters like Sansa, Naruto could be a protector figure, which would be a different dynamic compared to the original relationships in both Naruto's world and Westeros.
His relationship with Sasuke would be different. Instead of the intense rivalry based on power and recognition, it could be more about their different approaches to protecting the village. Naruto, with his skills from Totosai, might offer Sasuke unique weapons or tools to aid him in his missions.
If Naruto was in the Hidden Cloud, his relationship with the Raikage would be crucial. The Raikage is a strong - willed leader. Naruto might start off on the wrong foot with him due to the Cloud's past conflicts with Konoha. But as time passes, they could develop a mutual respect. His relationships with other ninja in the Cloud would also be different. They might be more competitive given the Cloud's focus on strength.
If Naruto sees a future where he and Sakura are not as close as they are in the present, he might start to distance himself from her, thinking it's for the best. Or on the other hand, he could try to change the future by being more open and communicative with her. Also, with Sasuke, if he sees a future where Sasuke is in more danger than he thought, he would redouble his efforts to keep Sasuke safe and this would likely deepen their complex relationship.
His relationship with Sasuke would be very different. Since the Sharingan is an Uchiha - related thing, Sasuke might be both jealous and intrigued. They could end up being rivals in a whole new sense, competing to see who can master their respective powers better.
Karui is often a main redhead character. She's from the Cloud Village and has a tough and feisty personality. In the fanfiction, she might be one of the characters attracted to Naruto and her interactions with him can be really interesting, especially considering her different upbringing compared to Naruto.
His relationships with his friends would likely be strained at first. They might be jealous of his immortality or worried about how it will change him. For example, Sasuke might see Naruto's immortality as another way that Naruto is 'better' than him, which could lead to more conflict between them. However, over time, his true friends would come to accept it and see it as a way to keep Naruto around forever.
He might be really surprised. He would see all kinds of new interpretations of his world, his friends, and his adventures. Some fanfics could show him achieving even greater things in the future, which would make him feel proud. And if there are fanfics that explore his relationships in new ways, he'd be quite intrigued.
He might be shocked. In the fanfic, if he sees things like his friends' future achievements or the new threats that emerge, it would surely startle him. For example, if he discovers that one of his friends has a family of their own and has become a great leader in the village, he would be proud but also a bit surprised at how much has changed.