In this fanfiction, Naruto may encounter some of the old and forgotten clans during his banishment. These clans might have knowledge about the sage arts that has been lost over time. He could also cross paths with a group of wandering ninjas who have their own unique styles of combat and spiritual practices. These meetings could shape his journey to becoming a sage and give him new perspectives on the shinobi world that he was once a part of.
He might meet other banished shinobi who have formed their own small community. They could teach him different techniques that are not known in Konoha.
Naruto could meet a reclusive sage who has been observing the shinobi world from afar. This sage could have a completely different view on chakra and ninjutsu, and help Naruto on his path to becoming a sage. Another possibility is that he meets some kind of mythical creature that is associated with the sage arts and that creature becomes his guide.
In such a fanfiction, Naruto might gain unique sage powers that are different from the normal sage mode in the original series. He could use these powers to protect a hidden village of outcasts that he discovers during his banishment.
Well, in a fanfiction like this, it could explore Naruto's sage mode abilities in a new context while he's with Yugito who has also been banished. Maybe they form an alliance to fight against the forces that banished them. They could discover new powers together and change the shinobi world's view of them.
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.
He would most likely meet his father, Minato Namikaze, and his mother, Kushina Uzumaki. These are the two main family members he never really got to know growing up.
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.
Naruto could meet some young and upcoming Iwa ninja trainees. They might be curious about Naruto and his abilities from Konoha. These trainees could either look up to Naruto or be jealous of his fame, leading to various interactions. Also, there could be some old - timer Iwa ninjas who remember past events involving Konoha and have their own views on Naruto's presence in Iwa.
There's a possibility that Naruto meets some of the younger generation of shinobi in Suna. These new characters could be eager to learn from Naruto or challenge him to a friendly spar. He may also come across some of the elders in Suna who have their own stories and wisdom to share with Naruto.
He might meet his sensei, Jiraiya. They could have long talks about Naruto's growth as a ninja and Jiraiya could give him more wisdom from the afterlife perspective.
He might meet an old acquaintance who is also alone. They could share their stories and perhaps find some comfort in each other's company.
Naruto could also meet the previous Hokages in their prime. He could learn from them directly and perhaps even influence their decisions. For example, he might be able to convince the First Hokage to handle the Uchiha clan's situation differently, which could have a huge impact on the future (or in this case, the future that Naruto comes from).