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.
Maybe some rogue ninjas who have a vendetta against the Hyuga clan. They could be former enemies who once suffered at the hands of the Hyuga and don't want to see them rise again. These rogues would constantly try to sabotage Naruto and Hinata's efforts in the restoration act, attacking their supply lines or stealing important clan artifacts.
There could also be some within the village's political structure who oppose the restoration. They might be worried about the balance of power shifting too much in favor of the Hinata clan. These individuals would use underhanded tactics like spreading false rumors about the clan or trying to block any legislation or support that Naruto and Hinata seek for the restoration.
In this fanfiction's plot, it could be that the Hinata clan has lost its unique abilities over time due to various reasons. Naruto, with his own experience of growing and becoming stronger, takes on the task of helping Hinata revive her clan. They embark on a journey to find ancient scrolls or artifacts related to the Hyuga clan. Along the way, they face many challenges, like traps set by enemies who don't want the Hyuga to be restored. As they progress, they also discover new things about the clan's past that help in the restoration process.
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.
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 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 plot of a 'Clan Restoration Act Naruto Fanfiction' might involve the economic aspects of clan restoration. Restoring a clan means building infrastructure, providing education for the new clan members, etc. Some clans might struggle with financial resources. There could be a storyline where a small, almost extinct clan tries to make a comeback but faces difficulties due to lack of funds. Moreover, the act could also lead to new alliances being formed between clans. Maybe a weaker clan teams up with a stronger one for mutual benefits during the restoration process.
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.
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.
Another potential antagonist could be a rogue shinobi who has a vendetta against the Uzumaki clan from the past. He doesn't want to see the clan restored and uses his own dark jutsu and a network of followers to try and stop Naruto at every turn. He might be jealous of the power the Uzumaki once held and fears they will regain that power.