Maybe he sees something in Naruto that makes him want to share. Naruto has a strong belief in peace that might make Nagato feel like he should explain his own actions and past.
There are several reasons. Firstly, Naruto's unwavering belief in a different kind of peace might intrigue Nagato. He has been on a different path, causing destruction in the name of peace. By sharing his story, he can compare and contrast his views with Naruto's. Secondly, Naruto has shown strength and resilience, which Nagato may respect. He wants Naruto to know the full context of his actions, including the pain and suffering that led him to become who he was. Lastly, Nagato may be looking for some form of redemption or understanding, and Naruto seems like the person who could offer that. By telling his story, he hopes to make Naruto see the world from his perspective, at least to some extent.
Nagato might choose to tell Naruto his story because Naruto is a fellow ninja who has also experienced pain and loss. He may hope that by sharing his story, Naruto can understand his motives and the path he has taken. Also, Naruto has been fighting against Akatsuki, and Nagato could want to show him that his actions were not just out of pure evil, but rather a result of his life experiences and his warped view of peace at that time. He may also see in Naruto the potential to change the ninja world in a way that he once hoped to do himself.
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.
It would change his abilities in multiple ways. Firstly, with the Rinnegan, Naruto could have better perception of the world around him, similar to how Nagato was able to sense things from afar. Secondly, he might be able to use the Animal Path to summon powerful creatures. This would give him more options in battle. Also, the Rinnegan could potentially allow Naruto to access some form of chakra absorption or manipulation that he didn't have before, further diversifying his power set.
She might want to inspire others. If she has gone through a tough situation like beating an addiction, by sharing her story, she can give hope to those who are currently struggling with the same problem.
Perhaps she wants Elena to understand her better. Rebekah may feel that Elena has misjudged her in the past, and by sharing her story, she can show Elena her true self.
Another reason could be that Nagato wants to atone for his past actions. By giving Konan to Naruto, he is making a gesture of goodwill. He might believe that Naruto can use Konan's skills and knowledge to make amends for the damage he and his group have caused. It's a way of starting a new chapter and leaving a positive legacy through Konan.
Well, Nagato's story probably focuses on his childhood in Amegakure. He witnessed so much death and destruction there. He might tell Naruto about how he met Yahiko and Konan, and how they dreamed of bringing peace to their village. But things went wrong, and his experiences made him believe that only through pain could the world understand true peace. Naruto, on the other hand, believes in a different kind of peace, one achieved through understanding and friendship. So, these differences in their beliefs could be an important part of what Nagato tells Naruto.
He might tell his story to share his experiences with others.
Maybe he wants to share his experiences with others. He could have had some unique or interesting things happen to him that he thinks others can learn from.
Maybe he wants to share his unique experiences and lessons learned during his journey.
She might want to preserve her family's heritage. By sharing the story, she ensures that the family's unique experiences and values are not forgotten.