Since we don't know the details of the '7th man story', the main characters could be the 7th man himself and the people around him in the story.
The most obvious main character is the 7th man. But in a story, there are often other characters who interact with the main one. In this case, there could be comrades if he was in a group situation, or perhaps an antagonist who causes problems for him. There might also be a love interest, which could add an emotional layer to the story. Without reading the story in detail, it's hard to name all the main characters precisely, but the 7th man is surely at the center of it.
The main characters in the '12th man true story' are likely to be those directly involved in the event that the story is based on. If it's a sports - related story, it could be the players on the team and perhaps a key fan or supporter who represented the 12th man. If it's a different kind of story, like a military or adventure story, it would be the people in that situation, with the 12th man being someone who made a difference at a crucial moment.
I'm not sure specifically as there's not enough information given. But it could be the 12th man himself, whoever that might be. There might also be the other members of the group or team that he was associated with, like teammates in a sports team or comrades in a military unit.
In 'the 7th man short story', the most significant character is the 7th man. He is the narrator and the one whose inner thoughts and emotions are explored deeply. His friend, who was unfortunately swept away by the wave, is also a main character in a sense. His presence, or rather his absence after the wave, is what drives the 7th man's story. There may be other minor characters around the 7th man, but they are not as crucial to the core of the story as these two.
The main character is the 7th man himself. He is the narrator and the one whose experiences the story focuses on. His friend, who was taken by the wave, is also an important character, though we don't get as much direct information about him.
I don't know the exact main characters as I haven't read the novel. But surely, the 8th man is one of the main characters. There might be his friends or foes who play important roles in the story.
The main character is surely the 12th man. He is the focal point of the story. Besides him, there might be characters like his comrades in a military - like scenario, or his teammates in a sports - related story. Maybe there are also antagonists or challenges in the form of opposing forces or difficult situations that he has to face, which could be personified as characters in a way. For example, in a military story, the enemy soldiers or the harsh weather conditions could be considered as 'characters' that interact with the 12th man.
The main character is likely the '4th man out' himself. He's the central figure around which the fanfiction is built.
Since it's a short story called 'the 10th man', there are likely at least ten characters. There are the nine men who form a group, and then there is the tenth man who is distinct in some way from the others. But without more details about the story, it's hard to say more about their individual personalities or roles.
There are the four wise men, of course. Each of them has their own characteristics. And there might be other characters that they meet during their journeys, like the people in the villages they pass through or the ones who offer them shelter or advice along the way.