Another possibility is that there are some sort of ancient evil forces. Maybe there are dark entities that were sealed away long ago and Mito's connection to the Nine - Tails somehow awakens them. These forces could be more powerful than the normal ninja threats and would pose a great challenge to Mito and the Hidden Leaf Village.
Overall, the fanfiction offers unique perspectives and creative takes on the Naruto universe. It might deviate from the canon but in an engaging way. Some fans love it for the fresh ideas it brings.
The main antagonists could be a group of rogue ninjas who are after the secrets of the Uzumaki clan. Since Naruto is Mito's brother, they might target him to get to those secrets.
Well, in this fanfiction, it could be that the 'fury' aspect is related to some sort of threat to the village or to Mito herself. Perhaps there are enemies who are trying to take advantage of her connection to the Nine - Tails. This would lead to some intense action scenes where Mito has to use her skills and the power of the Nine - Tails to defend what she holds dear. And it might also show how she interacts with other characters in the face of this danger, like the early Hokages or other important members of the Uzumaki clan.
Since it's about Uzumaki Mito, she is likely one of the main characters. There might also be other characters from the Naruto universe like Hashirama Senju, as he was related to Mito. Maybe some of the early villagers of Konoha could be in it too.
I'm not sure specifically as there could be many different interpretations in fanfiction. It might be about Mito Uzumaki and some sort of fury - related situation in the Naruto universe, perhaps her showing great power or facing a difficult challenge.
Obviously, Mito would be one of the main characters. Naruto might also be involved as it has 'naruto' in the title, and perhaps they interact in some important ways in this fanfiction.
Well, obviously Naruto and Mito Uzumaki are the main characters. Naruto, the protagonist of the Naruto series, is a powerful ninja with the Nine - Tails sealed within him. Mito Uzumaki was the first jinchuriki of the Nine - Tails in Konoha. In fanfiction, they are often the central focus, whether it's about their relationship, their powers, or their roles in the history of the ninja world.
It could be a group of rogue ninja who are after the Uzumaki's powerful sealing jutsu. They see it as a way to gain unlimited power and rule the ninja world, so they target the Uzumaki clan, which makes Naruto their main enemy as he stands in their way.
The main antagonists could be some of the conservative elders in the Hidden Leaf Village. They banished Naruto in the first place and would see his rebuilding of the Uzumaki clan as a threat to their power. They might try to undermine his efforts by spreading false rumors about him and his new clan.
Perhaps an old enemy of the Uzumaki clan, long thought to be defeated, resurfaces. They see Naruto as a threat because of his position as the heir and aim to eliminate him before he can fully embrace his Uzumaki heritage and power. This could be someone with a vendetta against the Uzumaki for past events, like a clan that was defeated by the Uzumaki in the past and now wants revenge.