His closest friends like Sasuke would most likely support him. Sasuke, who has also seen the dark side of the shinobi world, would understand Naruto's reasons for rebellion. Also, Sakura, who has always been by Naruto's side, would be there to support him. Shikamaru, with his intelligence, might also see the need for change and back Naruto up.
In such a fanfiction, Naruto would have the support of many. Firstly, his old team members like Kakashi would probably support him. Kakashi has always believed in Naruto and would understand if Naruto felt the need to rebel for a just cause. The members of the Akatsuki who have been redeemed, like Nagato's former comrades, could also join Naruto. They have seen the flaws in the current system and might see Naruto's rebellion as a way to create a better world. Additionally, the younger generation of ninjas who look up to Naruto, such as Boruto and his friends, would be eager to support Naruto in his fight for a better shinobi world.
Hermione would surely support Harry. She's always been by his side, and with her intelligence and knowledge of magic and wizarding laws, she'd be a great asset. Ron would also be there, providing his loyalty and his own brand of courage.
His friends like Sasuke would most likely support him. Sasuke, having walked a long path of redemption, would see Naruto's vision of an empire as a way to finally achieve the peace they both have been longing for.
I think some of the younger ninjas in the village would support Naruto. They look up to him as a role model. Also, those who have been helped by Naruto in the past, like the families of the villagers he saved. They would see that Naruto is fighting for what's right and would stand with him against the council. Additionally, some of the outcast ninjas who feel oppressed by the council's rules might also join Naruto.
The villagers of the Land of Waves would surely support Naruto. They have suffered a great deal under Gato's rule, so they would see Naruto as their savior. Also, Sasuke might support Naruto. Even though they have their differences, Sasuke would recognize the need to stop someone as evil as Gato.
His friends like Sasuke, Sakura, and Kakashi would surely support him. They have been through a lot together and know Naruto's good heart and leadership potential.
Sakura might support Naruto. She has always believed in Naruto and his ability to do the right thing. So when he becomes the leader of Root, she would see it as an opportunity for Naruto to bring positive change. She could offer her medical skills to help the Root members who may be injured during the transformation of the organization.
Sakura would probably support Naruto marrying Yakumo. She has grown to be a good friend of Naruto over the years. She knows Naruto's big heart and when she sees how much he cares for Yakumo, she would be on board. Shikamaru, despite his laziness, would also offer his support. He is perceptive and can tell that Naruto and Yakumo are good for each other.
His friends from Konoha would surely support him. Sasuke might be one of them, as they have reconciled and share a deep bond. Kakashi, with his wisdom and experience, would also be there to offer advice. And of course, the rest of the Konoha 11 would contribute in their own ways, whether it's through combat support or helping with the infrastructure of the new kingdom.
One possible plot could be that Naruto is frustrated with the corrupt shinobi system. He might start by gathering like - minded ninjas who also feel oppressed. They could form a secret group and start small acts of resistance, like providing aid to villages neglected by the major shinobi powers. As their numbers grow, Naruto could lead them in a more open rebellion against the unjust leadership, aiming to create a new and fairer system for all shinobi.
His friends like Sakura and Shikamaru would surely support him. Sakura, with her medical skills, could be an important part of his regime, providing healthcare for the ninjas. Shikamaru, being intelligent, could offer strategic advice. Also, the younger generation of ninjas who have been inspired by Naruto would be his strong supporters, as they believe in his leadership and the new direction he could take the village in.