He could meet Mei Terumi. She is a powerful and important figure in Kiri. Naruto might have some interesting interactions with her, either as an ally or having some initial misunderstandings with her. Another character could be Chojuro. He's a kind - hearted ninja, and he might be one of the first to welcome Naruto in Kiri.
Naruto could encounter Zabuza's student, Haku. Haku has a tragic past and is very skilled. They could bond over their experiences of being different from the norm in their respective villages. Also, there might be some new, original characters created specifically for this fanfiction in Kiri. These could be other outcasts or ninjas with unique abilities that Naruto befriends or has conflicts with.
Well, one possibility is that Naruto, being banished from his village, arrives in Kiri with a lot of pent - up emotions. He might face initial hostility from the Kiri ninjas who are suspicious of an outsider. But as time passes, he could show his strength and kind heart, and start to make some unlikely friends among the Kiri population. Maybe he gets involved in some sort of mystery or conflict that is unique to Kiri, like the internal power struggles between different clans in Kiri.
In this fanfiction, Naruto could come across some of Kumo's young shinobi trainees. He could inspire them with his never - give - up attitude. And there's a chance he'll meet some of the village elders in Kumo who might have different views on how to deal with him, either seeing him as a potential asset or a liability.
He could meet Pain. Since Pain was from Amegakure, Naruto might encounter him or learn more about his past in the village. It would be an interesting encounter as they had a major battle before.
He would surely meet Gaara. Gaara, having had his own experiences of being an outcast, would likely be one of the first to interact with Naruto. They could share their stories and become good friends.
He could meet Konan. Konan is closely associated with the Hidden Rain Village. Her paper - based jutsu would be an interesting interaction for Naruto. Maybe she could teach him something about her unique style of combat or they could end up in a battle.
He could interact with Mei Terumi, the Mizukage. She might be initially cautious of Naruto but then see his potential and work with him. Also, Chojuro, as he is one of the important ninjas in Kiri. They could train together or go on missions side by side.
He could meet some space - faring ninjas who have adapted to the space environment. They might have unique chakra powers related to the cosmos.
Maybe some local tribespeople who have unique abilities or knowledge. For example, they could teach Naruto some ancient techniques or survival skills that are not known in the Hidden Leaf Village. There might also be wandering samurai or other shinobi from different regions who pass by the outpost and interact with Naruto.
Ruby Rose for sure. She's the main character in Remnant and Naruto would likely be drawn to her energy and determination. He could also interact with Weiss Schnee. Naruto might be interested in her family's power and wealth, and Weiss could be curious about Naruto's strange abilities. Another one could be Blake Belladonna. Given her past and her more reserved nature, Naruto might try to befriend her and help her open up more.
There's also Killer Bee. Since he has a connection to the outside world and is a powerful ninja. Naruto and he could cross paths in Kiri. They might even have some rap battles or just share their ninja experiences. Another character could be Zabuza. Even though he's dead in the original story, in a fanfic, Naruto could somehow encounter his spirit or a young Zabuza - like character and learn some of his swordsmanship skills.