In this fanfiction scenario, Naruto might gain a whole new set of skills and perspectives. Nagato has powerful jutsu like the Rinnegan abilities. He could teach Naruto more about the nature of chakra on a deeper level. Naruto might also learn different combat strategies that are more in line with Nagato's style of fighting, which could make him an even more formidable opponent.
Well, Naruto would probably face some challenges at first. Since the Rinnegan is such a powerful and complex dojutsu, even with Nagato's training. He might struggle to control the different powers it offers, like the ability to manipulate gravity or summon powerful creatures. But as time goes on, his natural determination and strong will would likely help him overcome these difficulties. And with Nagato's guidance, he could start to incorporate the Rinnegan's powers into his existing combat style, creating a unique and powerful fighting approach.
When trained by Nagato in fanfiction, Naruto's character development would likely involve a growth in his understanding of power. Nagato has a different approach to power compared to Naruto. Through Nagato's training, Naruto may learn that power isn't just about physical strength but also about knowledge and the ability to make tough decisions. This could add a new layer of maturity to Naruto's character.
His character would become more complex. Naruto has always been about hard work and believing in oneself, but with the Rinnegan training, he'd have to grapple with new levels of power. He might become more cautious as he realizes the potential destruction the Rinnegan can cause if misused.
In these fanfics, Nagato may help Naruto on an ideological level. Nagato once believed in a very different way of achieving peace. By sharing his journey and how he came to realize the flaws in his thinking, he can guide Naruto in his pursuit of true peace. Nagato could also use his influence over the Akatsuki remnants to prevent them from causing more chaos, which in turn helps Naruto in his mission to protect the ninja world.
Maybe Nagato had a relationship with an Uzumaki woman before he became fully involved in the Akatsuki. This woman could have given birth to Naruto but for some reason, Naruto was separated from Nagato at a young age. It could be due to the chaos and danger that Nagato was getting into with his plans for the Akatsuki.
In some fanfictions, Naruto and Nagato might be related through their shared experiences with the ninja world. They both faced great tragedies. Naruto could be seen as a successor to Nagato's ideals in a way. Nagato once wanted peace through force, but Naruto shows that peace can be achieved through understanding and forgiveness.
One possibility is that there was some sort of spiritual or chakra - based connection between Naruto and Nagato. Nagato, being the possessor of the Rinnegan, recognized Naruto's strong will and the fact that he was on a path to change the ninja world for the better. Through this connection, Nagato was able to transfer the power of the Rinnegan to Naruto. It could also be related to the nature of the Sage of Six Paths' power that was somehow involved in this transfer, as both Naruto and Nagato were related to the Sage in different ways.
In some fanfiction concepts, there could be a spiritual or mental connection established between Naruto and Nagato. Since Naruto has this unique ability to understand and connect with people on a deep level. Through this connection, Nagato might pass on the power of the Rinnegan to Naruto. It could be like a transfer of not just the physical power but also the knowledge and understanding that comes with the Rinnegan.
Another theme is friendship. Despite their different backgrounds and past enmity, they form a strong bond. This bond is usually tested through various trials and tribulations in the story. It shows that even the most unlikely people can become friends.