Well, the main character is likely the ugly tree itself. It is the focus of the story and the one around which the plot revolves.
There could also be other characters like the animals or people who interact with the ugly tree. For example, if there are birds that make nests in the tree, they could be secondary characters. They might initially be put off by the tree's ugliness but then come to accept or even rely on it.
There's no way to be sure without reading the specific story, but it might include the person who discovers the ugly Christmas tree, perhaps a child or an old man. And there could be other characters like those who initially reject the tree.
The main character is undoubtedly the ugly duckling. It goes through a lot of pain and loneliness. Then there are the various animals in the farmyard. The ducks that shun the ugly duckling, the hens that mock it, and the cat and the old woman who also don't really accept it. And at the end, the majestic swans that the ugly duckling realizes are its true kind play a crucial role in the story. They represent the final acceptance and the transformation of the ugly duckling into its true self.
The main character is the ugly duckling. Then there are the other ducks in the pond where the duckling was born. These ducks made the duckling feel out of place because it was different from them. There are also the hens and the cat that the duckling met during its wandering. And finally, the beautiful swans which the duckling discovers it is one of them in the end.
The main character is the ugly duckling itself. There are also the other ducks, hens, and the cat in the story. The other ducks are the ones who initially reject the ugly duckling because it looks different from them.
Perhaps the moral is related to perseverance. Despite being ugly, the tree still exists and might be thriving in its own way. This can show that no matter how unappealing or different one may seem, with determination and the ability to endure, one can still have a meaningful existence.
I'm not sure exactly who the main characters are without reading the story. But usually in a short story, there are one or two central characters that drive the plot forward.
I'm not sure as the story isn't described here, but it could be a gardener who takes care of the fig tree. This person might be central to the story as they have a connection with the fig tree.
Since I don't know the specific 'Trouble Tree Short Story', it's hard to say. But it could be a young adventurer who stumbles upon the trouble tree and has to deal with its consequences. Maybe there's also an old wise man or woman in the story who gives advice on how to handle the trouble related to the tree.
I'm not entirely sure without reading the story in detail, but it could be a young protagonist, perhaps a person who is at a crossroads in life.
Since I haven't read the story, I can't say for sure. But there might be a child who discovers the tree.