Obviously Naruto himself is very popular as he is the main character of the original series and the focus in these fanfictions too. Gaara is also quite popular as he is from Suna. Their interactions are often a big part of the stories.
He would surely meet Gaara. Gaara has had his own struggles and he might be able to understand Naruto on a deeper level. They could form an even stronger bond than before, with Gaara helping Naruto hide from those who might be looking for him in Suna.
The younger ninjas in Suna would be excited. Naruto is a well - known and powerful ninja. They would look up to him and want to train with him. The elders in Suna might be a bit more cautious at first. But once they see the benefits Naruto can bring, like better relations with Konoha and new ninja techniques, they would start to accept him. Overall, there would be a mix of excitement, caution, and anticipation in Suna.
There could be a Suna ninja who becomes Naruto's mentor. This ninja might have a special skill in using sand and wind chakra together and teaches Naruto how to control his own chakra better in the Suna environment. Another potential character could be a young Suna girl who befriends Naruto and shows him the ropes of living in Suna, like where to find the best oasis for water.
There could be new Suna shinobi that Naruto befriends. For example, a young and talented sand ninja who has a unique jutsu related to the desert environment, like being able to manipulate sandstorms on a small scale. Another potential character could be an elder in Suna who has a lot of knowledge about the village's history and secrets, and who helps Naruto understand his new role in Suna.
Gaara could be a main character. Since Naruto has a connection with him already, Gaara could play a big role in helping Naruto adjust to life in Suna. Maybe he becomes like a brother to Naruto in this new setting.
Sakura from Leaf could be a key character. Her medical skills would be in high demand on the battlefield to save the wounded. Temari from Suna, being a strong kunoichi, would be important in leading Suna's forces. Also, Shikamaru from Leaf, with his strategic mind, could be the one devising plans for Leaf's military operations against Suna.
Naruto is the key character as the title implies his movement to Suna. Gaara will most likely be a main character as well. His leadership in Suna and his connection to Naruto make him a natural choice. Additionally, some of the Suna elders or other important shinobi might be involved as secondary main characters, as they could be the ones who interact with Naruto and influence the events in Suna.
He might meet Gaara. Since Gaara is the Kazekage of Suna, it's very likely that they would cross paths. Naruto and Gaara have a history, so their encounter could be filled with reminiscing about their past battles and how far they've come.
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.
There could be new characters created specifically for this fanfiction. Maybe a young Suna shinobi who becomes Naruto's guide in Suna, showing him around the village and introducing him to the local way of life.