Obviously Naruto would be one of the main characters. Since it's about the Namikaze clan restoration, he's the key figure as he is part of the clan. There might also be some of his friends like Sasuke who could support or oppose his efforts in different ways.
Naruto is surely a main character. Besides him, perhaps some older members of the Hidden Leaf Village who have knowledge about the Namikaze clan's history could play important roles. And maybe there will be some new characters created specifically for this fanfiction, such as descendants of the Namikaze clan who were thought to be lost but are now found and help in the restoration process.
It's likely that this fanfiction is centered around the idea of resurrecting the Namikaze clan. Naruto, being the main character, would probably be at the forefront of this restoration. The story could show how he overcomes various obstacles such as lack of knowledge about the clan's past, resistance from within the Hidden Leaf Village who fear a powerful clan's resurgence, and his own personal struggles in taking on such a huge responsibility.
Naruto would surely be one of the main characters. Given his status as a hero in the Naruto universe, he would be involved in the Clan Restoration Act, either as a supporter or a mediator. Sasuke could also be a main character as his clan, the Uchiha, was destroyed and he might have a strong opinion on the restoration. Sakura, being part of Naruto's group, would also play a role, perhaps in the medical support or training of the new clan members. Additionally, the clan leaders or representatives of the clans being restored would be main characters, like the Hyuga clan head.
It's hard to say without reading it. But it could be female versions of the main Naruto clans' members, like a female Naruto from the Uzumaki clan or a female Sasuke from the Uchiha clan.
Naruto is often a main character as he is usually at the center of any major change in the Naruto universe. Sasuke might also be involved as he has his own ties to the Uchiha clan and its restoration could be part of the story. Hinata could play a role too, considering her clan's importance and how the overall restoration act might affect the Hyuga clan.
The main antagonists could be other powerful clans in the Hidden Leaf Village. For example, the Uchiha clan (if they were still around and had some grudges or power struggles). They might see the restoration of the Hinata clan as a threat to their own status and power within the village.
It could be some rogue ninja groups. They might fear that a restored Uzumaki clan would disrupt the current balance of power in the ninja world. These groups could target Naruto and his supporters, stealing resources meant for the clan restoration or spreading false rumors about the Uzumaki clan to turn public opinion against them. Also, there might be some corrupt politicians within Konoha who oppose the restoration act for their own self - serving reasons.
I'm not entirely sure specifically about the 'Naruto Clan Restoration Act' in Mei fanfiction. It could be a unique plot device created by the fanfic author to bring back the Naruto clan in some way, perhaps through political means or some kind of magical/special ability within the context of the fan - created story.
I'm not entirely sure as there could be many different interpretations of such a fanfiction. It might be about female characters in the Naruto universe taking part in an act to restore their clans, perhaps involving things like rebuilding their families, reclaiming lost traditions and powers.
Aside from Naruto and Sasuke, characters like Sakura can also be involved. She could use her medical ninjutsu skills to help in the restoration process, maybe by finding cures for clan - specific ailments that have hindered the growth of certain clans. Also, Kakashi might play a role as a mentor, guiding the younger generation in their efforts to restore the clans.
One interesting plotline could be the challenges faced in actually implementing the Clan Restoration Act. For example, there might be political opposition from some villages or clans who fear a shift in power dynamics. Another could involve the discovery of long - lost clan techniques during the restoration process, which then become a key part of the story as characters learn and adapt to these new abilities.