As I haven't had the chance to read this 'the orphan girl short story', it's difficult to name all the main characters. But it's likely that apart from the orphan girl herself, there could be a sympathetic neighbor or a strict authority figure in an orphanage if there is one in the story. These characters would play important roles in shaping the girl's experiences.
Obviously, the main characters are the pony and the orphan girl.
In many 'the orphan girl story' variants, the orphan girl is central. Then there might be a villainous figure, perhaps someone who tries to take advantage of her situation. And there could be a mentor - someone who gives her advice and helps her navigate the difficult world she's in. For example, an old lady who has seen a lot in life and teaches the girl valuable lessons.
I'm not sure as I haven't read the specific 'the orphan girl short story'. But generally, it might be about the challenges and adventures an orphan girl faces, like finding a place to belong or dealing with hardships in a world without parents.
The main character is the orphan girl. She is the one around whom the whole story revolves. All the events, emotions, and developments in the story are likely to be connected to her experiences, her dreams, and her challenges as an orphan.
The main characters are obviously the orphan boy and the elk dog.
The main character is surely the girl on the train. There may also be other passengers or train staff that could be considered important characters depending on the story.
The main characters are the girl and the wolf, as the title clearly suggests.
I don't know the exact main characters in this story since I haven't read it. But surely, the girl herself is a main character. There might also be other characters like her family members or friends who could be related to her situation with the mirror in some way.
The main character is the match girl. There may be some other minor characters like the people who pass by her without buying any matches, but the focus is mainly on the girl and her experiences. For example, the people who ignore her contribute to the sense of her loneliness and despair, but still, she is the central figure.
The invisible girl must be the central character. Then, there could be a friend or a mentor figure. Maybe a person who discovers her invisibility by accident and then tries to help her. Another possible main character could be an antagonist, someone who wants to use her invisibility for bad purposes or is a threat to her in some way.