Maybe it's the new owner of the house. When people move into a new place, they tend to explore every nook and cranny. The new owner might be looking for storage space in the cellar and end up uncovering things that were meant to be kept secret.
It could be the main character of the story. Often in such stories, the protagonist is the one who stumbles upon the secrets.
It could be the owner of the snake farm. Since they run the place, they are likely to be the ones who know the most about what goes on there and uncover any secrets related to the snakes and the farm's operations.
The secrets in the cellar story could be about many things. It might be about hidden treasures, like gold or jewels that someone stashed away long ago. Maybe it's a family secret, such as a long - lost relative's diary or some dark event from the past that the family doesn't want known.
It could be Naruto himself. As he grows and faces new challenges, he might stumble upon these secrets, either by accident or through his own determination to learn more about his world and his place in it.
Newt Scamander might be one who discovers important secrets. Given his close association with magical creatures and his in - depth knowledge of the magical world, he could stumble upon secrets related to Dumbledore. His adventures often lead him to uncover things that others miss.
Probably Dumbledore. He has a deep understanding of the magical world and his connection to Grindelwald gives him insights into many of the secrets.
As I don't know the exact story, it's difficult to say for sure. But surely the boy in the cellar is one of the main characters. There might also be someone who put him there, if it's that kind of story, so that person could be another main character. Or perhaps there are family members or friends who are looking for him, and they would also be main characters.
No, generally a cellar is not counted as a story. A cellar is mainly used for storage, often has a low ceiling, and is not typically designed for living or working spaces like a proper story would be. It doesn't have the characteristics of a regular story such as easy access, suitable height for occupancy, etc.
I'm not sure. It might be based on real events, but it could also be entirely fictional.
Not likely. Usually, such stories are the product of the author's imagination to thrill and entertain. There's no indication that it has roots in reality.