Well, Naruto is obviously a main character as it's in the title. Sasuke is also often a key character since he's an Uchiha. In many fanfictions, they might team up in a way that's different from the original series. Itachi could also be a major presence, his actions and past often playing a role in the story, whether it's through his influence on Sasuke or some new revelations about his motives.
Naruto himself is often a main character. Since he has a connection with the Nine - Tailed Fox, he is frequently involved in stories related to the Fox Clan. His growth and new powers gained from interactions with the clan are common themes.
Often, the leader of the wolf clan is a main character. He or she might be a strong and wise figure, guiding the clan through various challenges in the Naruto - influenced world. Another common main character could be a young, rebellious wolf - clan member who wants to break away from the traditional ways of the clan and make a name for themselves in the larger Naruto universe.
Obviously, Sakura Haruno herself is the central character. Her friends like Naruto and Sasuke may also be prominently featured as they are important in her life. Additionally, if the fanfic delves deep into the clan, there might be some made - up characters who are Sakura's relatives, like an elder in the clan who imparts wisdom or a cousin who has a unique ability.
Naruto is the central figure for sure. But there could be other Uchiha characters like Shisui who could be involved. Shisui was known for his loyalty and strong will. He could befriend Naruto and help him adjust to the Uchiha way of life. And of course, the clan leader at the time of Naruto's adoption would also be a key character, making decisions about Naruto's place within the clan.
Sasuke Uchiha would be an obvious choice. He's a central Uchiha character in the Naruto series. His journey to avenge his clan and his complex relationship with the rest of the Uchiha could be further explored during the clan wars. Another could be Itachi Uchiha. His actions and the secrets he held were crucial to the Uchiha's situation, and in a fanfiction about the clan wars, his role could be even more in - depth.
Yang Xiao Long, who is related to the Branwen family, can also be a main character in these fanfictions. She could meet Naruto and they could have some really fun adventures together. Maybe they compete in some sort of fighting tournament that combines the fighting styles of both universes.
Obviously Naruto is a main character in most Naruto Saint fanfiction. He is usually the one who gets involved with the saint - like elements. Another character could be Sasuke. Sometimes in these fanfictions, Sasuke might be jealous of Naruto's new saint - related powers.
Well, obviously Chronoa herself is a main character. Naruto is also often included as he is the central figure in the Naruto series. They might interact in ways that change the course of the Naruto story. For instance, Chronoa could help Naruto unlock new forms or powers related to time.
Sasori could also be a main character. Given his skills and interest in unique weapons, the Gunbai could be something he either covets or has some prior knowledge about. He might try to incorporate it into his puppet - making, creating a powerful new weaponized puppet.
Well, Naruto himself is obviously a main character. His cunning is the focus, so he'll be at the center of most of these fanfictions. Sasuke is also often featured. His relationship with Naruto can add a lot of depth. They might be rivals in terms of their cunning strategies at times.