Their relationship would likely become more complex. With the Rinnegan involved, they might have to rely on each other more for understanding its powers. They could become more protective of each other, knowing the power and the danger it brings.
Sasuke's reaction could be complex. At first, he would be enraged. After all, the Rinnegan is a symbol of his power and his journey to gain strength. However, he might also have some mixed feelings. He and Naruto have a deep bond, and he might wonder if Naruto had a good reason for taking it. But overall, his initial reaction would likely be one of fury and a desire to get his power back.
Well, if Naruto got the Rinnegan as a kid in fanfiction, it would completely rewrite the story. He'd have an edge in combat right from the start. With the Rinnegan, he could see chakra in more detail, which would make his learning of new jutsu easier. His opponents would be caught off - guard by his sudden access to such a powerful dojutsu. This could lead to some interesting plot twists, like him being able to solve problems in the village or against other ninja villages more quickly and efficiently.
Well, for Sasuke's Rinnegan to be involved in time travel in fanfiction, it might be linked to some ancient jutsu or hidden knowledge. For example, there could be a long - forgotten scroll that details how to use the Rinnegan for time - related feats. Sasuke, being the inquisitive and powerful ninja he is, could stumble upon this knowledge. Then, he might have to face the consequences of meddling with time, such as changing the course of events in the Naruto universe.
Their relationship could start as a rivalry. Fem Sasuke seeing Naruto with the Rinnegan as a new challenge to overcome. But as they face challenges together, they start to respect each other. Eventually, they could become friends and allies, relying on each other's strengths in battles.
Well, it could lead to a major shift in the power balance among the characters. Sasuke would be weakened without his Rinnegan, and Naruto would have to deal with the new power. There might also be some internal conflict within Naruto as he tries to come to terms with using Sasuke's power. Maybe he would feel guilty at first, but then realize it's for the greater good. Also, other characters like Kakashi or Sakura might have different reactions. Kakashi could be worried about Naruto being corrupted by the power, while Sakura might be more concerned about Sasuke's well - being without his most powerful ability.
Naruto's character would develop in multiple ways if he got the Rinnegan. Firstly, he would become more cautious. The Rinnegan is a powerful and dangerous ability, and one wrong move could have disastrous consequences. So he would think twice before acting. Secondly, he would gain a new sense of purpose. He might see himself as a guardian of a greater balance in the ninja world, not just the Hidden Leaf. His leadership skills would also be enhanced. He could use the Rinnegan to analyze battle situations more accurately and lead his comrades more effectively. Additionally, his view of the ninja world's history would expand, as the Rinnegan has connections to ancient powers and events. This would make him more of a sage - like figure, guiding the younger generation with his new - found wisdom and power.
In the wider ninja world, his relationship with other villages would change. Some villages might see him as an even greater threat now that he has the Rinnegan, and might try to form alliances against him. However, Naruto being Naruto, he would use his new power to show that he still has the same kind - hearted goals. He would try to use the Rinnegan to bring about peace even more strongly, and over time, win over those who were initially suspicious.
If Gaara got the Rinnegan in a fanfiction, his personality could change in several ways. He might become more introspective as he tries to understand the nature of this new power. Since the Rinnegan is associated with great power and knowledge, he could start to question his place in the ninja world more deeply. At the same time, he may become more isolated as he tries to master the powers of the Rinnegan, fearing that he could accidentally harm those around him with his new - found abilities. However, his core of kindness and protectiveness towards his village and friends would likely remain, but it might be tempered by his new power - related concerns.
If it's a crossover with the Fairy Tail guild, Natsu would be an interesting character to pair with Sasuke. Natsu is hot - headed and Sasuke is brooding. Their personalities contrast but they are both extremely powerful. Sasuke's Rinnegan powers could be used in combination with Natsu's fire - based magic in battles against powerful enemies. And they could have some great banter as they try to understand each other's worlds.