There could be the Akatsuki members as a sort of anti - circus group. They might try to steal the show or disrupt Naruto's circus for their own purposes. Hinata could be a shy but talented juggler in Naruto's circus. Shikamaru would likely be in charge of the logistics, always complaining about how troublesome it is but still getting the job done.
Sakura could be one of the performers, showing off her medical ninjutsu skills in a unique and entertaining way. Sasuke might be a brooding figure who is part of a dangerous acrobatic act. And Kakashi could be Naruto's adviser, helping him run the circus behind the scenes.
Iruka sensei could be a storyteller in the circus, recounting tales of the ninja world to the audience. Rock Lee would be an energetic and enthusiastic acrobat, constantly showing off his physical prowess. Tenten could be in charge of the weapon displays, turning her weapon - handling skills into a spectacular show.
Obviously Naruto would be a main character as it's a Naruto - centered fanfiction. He could be the ringmaster, bringing his energy and leadership skills. Sasuke could also be a major character, perhaps starting as a rival ringmaster or a reluctant performer who eventually comes to embrace the circus life. Sakura might be there too, as the medic of the circus troupe, taking care of any injuries that occur during the shows.
Sasuke could be involved. He might be initially skeptical or jealous of Naruto's new blessing but later come to understand its importance. Kakashi could also play a role, perhaps guiding Naruto on how to control and utilize this new power.
Sasuke is very likely to be involved. Since he's Naruto's rival and friend, he might be there to witness the meeting of different Narutos. He could be confused at first, but then he'd probably try to figure out how this strange phenomenon occurred. He might also get involved in battles or discussions that the Narutos are having.
In this fanfiction, Naruto could be a ringmaster in a magical circus. He discovers that some of the performers have secrets that are linked to the darker parts of the Naruto world. As he tries to uncover these secrets, he also has to keep the circus running smoothly. He might use his charm and leadership skills, similar to when he led his ninja teams, to keep everyone in line and the audience entertained.
Sasuke is a likely candidate in some fanfictions. Given their complex relationship throughout the original series, it's easy to imagine a scenario where Sasuke's thirst for power or some misinformation leads him to betray Naruto. Another could be Sakura. If she becomes jealous of Naruto's growing power or if she's manipulated by outside forces, she might turn against him.
Well, surely Hinata would be there. As Naruto's wife, she would support him in his role as Uzukage. Maybe Boruto and Himawari would also be involved, learning about their Uzumaki heritage from their father. And there could be some other Uzumaki clan members who have been in hiding and now come out to help Naruto lead the village.
One interesting Naruto Ringmaster fanfiction could be where Naruto becomes a ringmaster in a circus that features all kinds of ninja - like acts. For example, Sasuke could be a fire - breathing performer using his Sharingan - enhanced fire jutsu in a new and exciting way. Another might involve Naruto using his shadow clones to create a whole army of performers, making the circus show a huge success.
Sasuke would likely be featured. Since he and Naruto have a deep bond, Sasuke might be involved in Naruto's decision to retire or in filling the void left by him. Also, Naruto's family, like Hinata and his kids, would be important characters. They would be part of Naruto's post - retirement life, showing how they support him or how they are affected by his new lifestyle.
Iruka Sensei could also be a candidate. He was one of Naruto's first supporters and has a deep connection with him. He would probably risk a lot to save Naruto.
Iron Man is another candidate. Tony Stark's technology and Naruto's ninja techniques could be a great contrast. They could learn from each other. Stark might be interested in Naruto's chakra - based powers and try to replicate them in some way, while Naruto could be amazed by Stark's high - tech gadgets.