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.
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.
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.
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.
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.
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.
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.
In some naruto x mito fanfiction, Kurama, the Nine - Tails, can also be a significant character. Since Mito was the first Jinchuriki of the Nine - Tails, Kurama's presence and his relationship with both Naruto and Mito can add depth to the story. For instance, Kurama might share some memories of Mito with Naruto, which could change Naruto's perspective on certain things.
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.
A group of dark sorcerers who are envious of the Uzumaki's unique powers. They see Naruto's godlike state and Mito's sealing abilities as a threat to their plans of world domination. So they team up to try and take down Naruto and Mito before they can fully utilize their combined powers.
One possible plot could be that Naruto, as Mito's brother, discovers some long - hidden family secrets. Maybe he finds out about a special power that has been passed down in the Uzumaki family but was lost over time. He then embarks on a journey to rediscover this power and use it to protect the village in a new way.