It could be Naruto himself as he often is the central figure in many Naruto - related fanfictions. He might be exploring these new lands.
It could be about a whole new adventure in the Naruto universe. Maybe it focuses on the unique aspects of the Land of Claws and the Land of Fangs. It might involve new characters native to those lands, or perhaps some sort of conflict that Naruto and his friends have to face there.
Without reading the fanfic, it's difficult to determine the main characters. However, if it's about the 'daughter of the land', she is most likely the central character. And given it's a Naruto - based fanfic, there might be appearances from the main Naruto series characters such as Sasuke. They could be involved in her story, either as friends, mentors, or rivals.
Naruto is obviously a common character. He often visits the Land of Iron or gets involved in events related to it. Sasuke might also be there, as his journey often intersects with Naruto's. Then there are the samurai from the Land of Iron, like Mifune. He is a respected figure and could play a major role in fanfictions set in the Land of Iron.
I'm not entirely sure, but usually Touhou games have characters like Reimu Hakurei and Marisa Kirisame who often play important roles.
The main characters are Alex and Conner.
The main characters are the twins, Alex and Conner. They are the ones who enter the Land of Stories.
The main characters are twins. They enter the 'land of the stories' and throughout their journey, they meet numerous other characters like talking animals and wise old wizards. These twins are central to the story as they are the ones who drive the plot forward by exploring different parts of this magical land and interacting with its inhabitants.
I don't know for sure without reading it. But it could be Naruto himself. Maybe the story focuses on Naruto when he encounters someone or something with bloody fangs and he has to figure out how to handle it.
There could also be new human characters introduced in the fanfiction. These characters might act as catalysts for change in the world of the lustrous. They could be scientists or adventurers who stumble upon the world of the lustrous and their presence shakes up the existing order.
Often in such fanfiction, there's a hobbit protagonist, perhaps named Sam - like. He is deeply in love with the land and is constantly exploring it. There could also be some other hobbits who join him on his adventures. And there might be some non - hobbit characters as well, like an elf who has a shared interest in protecting the land and teams up with the hobbits.