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.
The main theme could be isolation. In the story, the characters might be isolated from society or from each other, creating a sense of loneliness.
The main characters are the stepmother, the stepson, the sister, and the father. The stepmother is the villain, the stepson is the victim, the sister is a key figure in bringing the stepson back to life, and the father is somewhat oblivious to the stepmother's evil deeds.
It's likely that there's a character who has a special connection to the wishing tree. Maybe an old man who has been guarding the tree for years. And then there are the villagers or people from the surrounding area who come to the tree with their various wishes. There could also be a character who doesn't believe in the tree's power at first but then has a change of heart.
Since I'm not familiar with this story, it might have a variety of characters. Besides the talking tree, there could be an old hermit who lives near the tree and has a special connection with it. There might also be some forest animals like a curious squirrel or a wise owl that interact with the tree.
Obviously, the boy and the tree are the main characters. The boy starts as a young child with simple desires like playing in the tree's shade. As he grows, his needs become more complex. The tree, on the other hand, is a constant presence, willing to sacrifice parts of itself to meet the boy's demands.
The two main characters are the tree and the boy. The tree is very giving and loving, always there for the boy.
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.
I don't know as I haven't read it, but it could be a female protagonist who is interested in beauty and discovers the lipstick tree.
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.
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.