I'm not sure as I haven't read the actual story. But it could be a lone traveler who is caught in the dark snow and has to find a way out.
It could also be a family. The dark snow affects their daily life, and they have to rely on each other to get through the difficult situation. For example, the parents might be trying to protect their children from the unknown dangers that the dark snow brings.
Maybe there are a group of villagers. They live near the area where the dark snow occurs, and they have different reactions and ways of dealing with this strange phenomenon. Some might be afraid, while others might be more curious and try to figure out what's causing it.
The main characters would likely still include Snow White and the Evil Queen. But in a dark version, there might be more focus on the Huntsman who could be a more developed character with his own moral dilemmas. And of course, the dwarfs would also be main characters, but perhaps with different personalities, like being more gruff or having their own agendas.
I don't know as I haven't read the story. It could be a lone adventurer in the snow, or a group of friends who get into trouble in the snowy environment.
The main characters in the Dark Parables Snow Queen story can vary. One of the most important is surely the Snow Queen, who is the source of the conflict with her icy powers. Then, there is likely to be a protagonist, perhaps a person from a nearby village or kingdom that has been affected by the Snow Queen's actions. This character may have a special quality, like a pure heart or great determination. There may also be characters like a wizard or a fairy who have knowledge about the Snow Queen and can help the protagonist. Additionally, there could be some animal - like characters that are either friends or foes in the story, adding more depth and variety to the cast.
There are the hunters themselves. I'm not sure of their exact names but they are the central figures in the story.
The snow maiden herself is a main character. There may also be the people who discover or interact with her, like a kind old man or a group of curious children.
The main character is definitely the boy. However, the other characters like the adults in his school, his peers, also play significant roles. The adults seem to be oblivious to his problems, and his peers might not have been close enough to him to notice his distress. All these characters together create a picture of a boy who was lost in the crowd and ultimately met a tragic end.
There are three main characters really. First, there's Gerda. She's the one full of love and courage. She doesn't let anything stop her from finding her friend. Then there's Kay. He gets caught by the Snow Queen and is in a bit of a daze in her ice palace. And the Snow Queen, she's this powerful and cold figure. She has the ability to create a world of ice and snow and she takes Kay away, which sets the whole story in motion.
Since I don't know the exact 'dark crystal short story', it might have some original characters created just for this short story. However, if it follows the general Dark Crystal universe, there could be Gelflings like Jen and Kira as main characters. These Gelflings are often in the center of the stories, trying to save their world from the Skeksis or other threats. There could also be some important Skeksis characters if the story focuses on the power struggle in that world.
Often, there is a central character, perhaps a person in a spooky or isolated place like a schoolteacher or a traveler. This character is the one who has the encounter with the face in the dark. There may also be other minor characters who are mentioned briefly to set the scene, like colleagues or fellow travelers who are not present during the main event.
There might be a local fisherman. He would know the waters well, but still be in awe or a bit scared of the 'dark waters'. He could provide some local knowledge and a connection to the area around the water. He might also serve as a guide or a warning to other characters.