He could develop the ability to use the Preta Path more effectively. This path allows the user to absorb chakra, and Naruto could use it to nullify enemy attacks that rely on chakra. For instance, if an enemy uses a powerful fire - style jutsu that is chakra - based, Naruto could absorb the chakra of the attack, rendering it useless.
Naruto might be able to fully master the Human Path. This path gives the user the ability to read minds and extract information. With Naruto's existing empathetic nature, he could use this ability in a unique way. He could perhaps use it to better understand the motives of his enemies and find non - violent solutions to conflicts. He would also be able to use the information he extracts to plan better strategies in battles.
With the Rinnegan, Naruto might gain the power of the Human Path. This would allow him to read minds or rip out souls, which is a very dark and powerful ability that would be quite different from his usual positive - natured powers.
He could develop the ability to use the Six Paths Sage Mode more effectively. Since the Rinnegan is related to the Sage of Six Paths, it would enhance his connection to that power. He might also gain the ability to create chakra chains similar to those of the Uzumaki clan but with an added Rinnegan - powered twist.
If Naruto gained Nagato's Rinnegan, it would completely change the power dynamics in the Naruto universe. Naruto already has his own powerful abilities like the Nine - Tails chakra. With the Rinnegan, he could potentially master all six paths techniques with ease. His combat capabilities would skyrocket, and he might be able to defeat enemies much faster. For example, he could use the Deva Path to manipulate gravity, which would be a huge advantage in battles against strong opponents.
He could have the ability to use all six paths techniques right from the start. This means he could manipulate gravity like the Deva Path, absorb chakra like the Preta Path, and even revive the dead like the Outer Path.
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.
Maybe he would gain the ability to control the life force of others in a new way. With the red Rinnegan, Naruto could potentially heal or harm on a much greater scale. He could revive the recently deceased by restoring their life force, or he could drain the life force of his enemies to weaken them. This would be a huge shift from his normal abilities and add a new moral dimension to his character as he decides when and how to use such a power.
He might gain the ability to see chakra in a more detailed way. Since the Rinnegan is known for its enhanced visual perception of chakra, Naruto could use this to his advantage when dealing with Kurama's chakra. He could also potentially use the Rinnegan's power to enter Kurama's mindscape in a new way, maybe with more control and understanding. Another possible ability is to transfer Kurama's chakra to others in a more efficient and controlled manner using the powers of the Rinnegan.
The Rinnegan would supercharge Naruto's abilities. Naruto already has a vast amount of chakra and with the Rinnegan, he could use that chakra in more diverse and powerful ways. He might gain the ability to use the Deva Path's power to manipulate gravity, which could be used both defensively and offensively. His Sage Mode combined with the Rinnegan could create a whole new level of fighting style, allowing him to quickly assess and counter his enemies' moves more effectively.
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.
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.