I don't know for sure since I haven't read it. But it could be the station master, some regular passengers, or a traveler who is just passing through.
As I haven't read this particular short story, the main characters could be a variety of people. It might include a young boy who is fascinated by the trains at the station, a tired businesswoman who always stops at the station on her commute, and a kind - hearted porter who helps everyone. Or perhaps there is a mysterious stranger who arrives at the station and changes the lives of those around him.
In the 'the station game story', the main characters might be a group of adventurers. They could be exploring an old, abandoned station. One character could be the leader, strong and decisive, leading the group through the various challenges in the station. Another character might be the tech - savvy one, able to figure out any mechanical or electronic puzzles in the station. And there could be a more cautious character, always warning the others of potential dangers.
In the 'Fruitvale Station Story', the most prominent character is Oscar Grant. His family and friends also feature significantly. His girlfriend, for instance, is part of the story as she was in his life and was affected by his death. His mother too is an important character as her relationship with Oscar is shown, and she had to deal with the aftermath of his death. These characters together help to paint a picture of Oscar's life and the community he was part of.
I don't know as I haven't read it, but it could be a traveler who is passing through the 5th level of Grand Central Station. Maybe there's a station worker who has a key role.
There could be multiple main characters. The gas station attendant is likely one, as they are there throughout the story. There may also be a kind - hearted traveler who has an interesting story to tell and spreads Christmas spirit. Additionally, if there are other employees at the gas station, they could also be main characters, working together to make the Christmas at the gas station a unique experience.
There could be a young and enthusiastic employee at the gas station. He is always full of energy and tries to bring the Christmas spirit to the gas station, like dressing up as Santa Claus to surprise the kids who come with their parents.
Perhaps the main characters are the customers. There could be a regular customer who always comes in at the same time every day, and through his interactions with the staff, we get to know more about the filling station. There might also be a traveling salesman who stops by the old filling station during his long journeys.
I don't know the story well enough to say for sure. But it could be the filling station owner, the employees, and the customers.
I don't know for sure, but it could be a lone survivor who is making their way to the last station.
I'm sorry, without knowing the actual story, it's hard to say who the main characters are. But it could be the gas station attendant, customers who stop by the gas station on Christmas, or maybe even a homeless person seeking shelter near the gas station.
Perhaps the main characters in the 'berlin station novel' are a group of individuals involved in some sort of international affairs. There could be a diplomat trying to negotiate treaties, a spy trying to gather intelligence, and a local activist fighting for change. Their different agendas and personalities would likely drive the plot forward.