Given that we don't have the full details of this short story, it's hard to determine the main characters precisely. However, the man himself is the obvious main character. There could be a love interest, perhaps, who is affected by the man's problem. Maybe there's also a mentor - like figure who offers advice or guidance to the man. For example, if the man's problem is career - related, this mentor could be an older colleague with more experience.
Since we have no information about the 'Man with a Problem' short story, the main character is the man who has the problem. But there could be other characters as well. For instance, if his problem is related to a family secret, there could be family members like his parents or siblings who play important roles. Or if it's a problem in a community setting, there could be community leaders or neighbors that are part of the story's fabric.
The two main characters are Sherlock Holmes and Professor Moriarty. Holmes is the brilliant detective, and Moriarty is his equally brilliant but evil nemesis. Watson also plays an important role as Holmes' friend and the narrator of the story.
Mr. Hawkins is another important character. He is Dave's employer. His relationship with Dave shows the power dynamics between an employer and a young, inexperienced worker. Dave wants to prove himself to Mr. Hawkins as part of his journey to manhood.
One possible theme could be struggle. Since the man has a problem, he must be struggling to overcome it or deal with it in some way.
The 'Man with a Problem' short story might revolve around a man facing a particular difficulty. It could be a personal issue like a relationship problem, or perhaps a more external one such as financial trouble or a conflict at work. Without reading the actual story, it's hard to be more specific, but these are common themes in such stories.
The 'A Man with a Problem' short story could revolve around a character who has a problem that is central to the plot. It could be that the man's problem is a mystery that the story gradually unfolds. For example, he could be dealing with a strange occurrence in his life that he doesn't understand at first. As the story progresses, he might try different ways to solve it, and through his journey, we learn more about him as a person and the world he lives in.
In the '3 body problem' related to celestial bodies, the main characters would be the three celestial objects themselves, like three stars or planets. Their masses, positions, and velocities are the key elements that define the problem.
It's hard to determine the main characters precisely without having read the story. However, the burning man is bound to be a central figure. There could be other supporting characters like a bystander who witnesses the burning man's situation, a friend or a foe who has a role in his story. Maybe there's a character who has a past connection with the burning man and that connection drives the plot forward.
The main character is likely the lawnmower man himself. There may also be the people whose lawns he mows, like homeowners in the neighborhood.
Obviously, the main characters are the rent man, who comes to claim what is due, and the tenant. The rent man is a symbol of the financial obligation side, and the tenant represents the person facing that obligation. There might also be other minor characters like neighbors who could add context to the situation, but the focus is mainly on these two.
The main character is the umbrella man. There might also be the person to whom he tries to sell his umbrella.