It could be the First Hokage, Hashirama. Naruto would be amazed by his powerful Wood - Style jutsu and his ability to create the village. He could learn about the original ideals behind the Hidden Leaf from Hashirama.
Teamwork is also a big theme. Despite being the same person in essence, the two Narutos often have to learn to work together. This can be challenging as they may have different personalities due to their different experiences. For example, one Naruto might be more cautious while the other is more impulsive. And the theme of friendship also plays a role, as they are, in a way, their own best friends in these stories.
In a fanfiction where Naruto meets an AI, it could be an interesting scenario. Maybe the AI has some unique powers or knowledge that Naruto can use to his advantage. It could also lead to some comical situations as Naruto tries to understand this strange new technology.
In many Naruto fanfictions where Naruto meets Kushina and Minato, it often creates a very emotional scenario. Naruto finally gets to meet his parents who he has only heard about. It could be a heart - warming reunion where they share stories, hugs, and Minato and Kushina get to see how far Naruto has come.
Well, it could be that Naruto meets the Hokage in a different time - space. They might work together to change some important events in the history of the village. For example, preventing a great disaster or changing the fate of some important characters. And Naruto could learn a great deal from the Hokage's wisdom and leadership in this encounter.
One interesting plot could be two Narutos from different timelines meeting. They could exchange stories about their battles and growth, and then team up to face a new, powerful enemy that neither could defeat alone.
Well, obviously Naruto himself would be the main character. There could also be his friends like Sasuke and Sakura, who might be involved in the interactions between the two Narutos. Maybe they are confused at first by seeing two Narutos, but then they help them figure out what's going on.
In many fanfictions, a meeting between Naruto and Kushina can be a very emotional moment. It might be a scenario where Kushina is somehow brought back, perhaps through some powerful jutsu or a time - travel plot. Naruto, who has always longed for his mother, finally gets to interact with her. He can show her all his growth and achievements, and Kushina can finally see the strong and kind - hearted son she always hoped for.
One possible scenario in this fanfiction could be Jiraiya taking on the role of a mentor to young Naruto even more intensively. He might teach Naruto some unique jutsu that are not part of the original storyline. For example, he could introduce Naruto to some ancient toad - related techniques that are only known within the toad clan.
Maybe the beautiful girl is actually a spy sent to gather information about Konoha. But as she spends time with Naruto, she's conflicted. Naruto, being his kind - hearted self, shows her the true spirit of Konoha. This changes her perspective, and she decides to abandon her spying mission and join Konoha. They then start a relationship based on mutual respect and new - found loyalty.