In the 'Naruto Hokage after Pein' fanfiction, Naruto may face challenges in uniting the different clans. After the destruction caused by Pain, there would be a lot of mistrust and internal conflicts. He would have to use his new - found respect as a hero to bring everyone together and work towards a better future for Konoha. He might also start training a new generation of shinobi with a different philosophy, one that focuses more on peace and cooperation rather than just power.
Obviously, Naruto is one of the main characters as the title implies he's the Hokage after Pein. Sakura could also be a main character as she is one of Naruto's closest friends and a strong ninja in her own right. Kakashi might also play an important role, as he has always been Naruto's mentor in a way.
One possible scenario in a fanfiction where Naruto becomes Pein could be that Naruto is exposed to some dark jutsu that alters his mind. This jutsu might be related to the Rinnegan's power. As a result, he starts to adopt Pein's ideology of bringing pain to the world in order to create peace. His friends would be shocked and try to bring him back to his normal self.
Another aspect could be Naruto's relationship with the other villages. After Madara, there might be a power shift in the ninja world. As Hokage, Naruto would work towards strengthening the bonds between the villages. He could initiate more joint ninja training programs and diplomatic meetings to ensure long - term peace.
There would likely be a change in the village's security measures. Since Madara had caused so much chaos, Naruto would beef up the defenses. Maybe he'd create new barriers or surveillance systems around Konoha.
In this kind of fanfiction, Naruto might bring a new era of peace and prosperity to the village. He would use his own experiences to reform the ninja education system, ensuring that the younger generation doesn't have to endure the same hardships he did. Also, he could focus on improving relationships with other villages, based on his belief in friendship and understanding.
Naruto would probably first assess the damage to the village. He would send out teams to check on the injured and start the process of getting the necessary supplies for the repairs. Then, he would call a meeting with the village council to discuss security measures to prevent future attacks like Pain's. He'd want to make sure that the village is well - defended and that they have a proper warning system in place.
One possible plot could be that Naruto is wrongly accused of something after the Pein attack. Maybe the village leaders believe false rumors that Naruto was in cahoots with Pein somehow. As a result, he is banished. He then goes on a journey to prove his innocence and in the process, he discovers new powers and allies. He might also encounter some of Pein's former followers who have their own motives and secrets related to what really happened during the attack.
Maybe Naruto's connection to Pein through the Nine - Tails is misinterpreted. Since Pein was after the Nine - Tails, the village believes Naruto is a liability. Banished, Naruto wanders into a hidden land where he learns ancient ninja techniques that are far more powerful than what he knew. He could then return to the village as a changed and more powerful ninja, but with a sense of bitterness towards those who banished him.
In fanfiction, if Naruto becomes the sixth Hokage, he would likely bring a new era of peace and prosperity to the village. He has always been a symbol of hope and perseverance. His leadership would inspire the younger generation to be strong and kind. He might also focus on improving relations with other villages, as he has friends all over the ninja world.