Since it's a collection of stories, there are likely to be multiple main characters across the different tales. In the story 'The Third Man', perhaps there is a character who discovers the presence of the third man, and this discovery drives the plot. In other stories, there could be characters who are dealing with personal problems or are involved in some sort of intrigue.
In 'the third man and other stories', the main characters would vary from story to story. In some stories, there could be a protagonist who is on a journey of self - discovery. They might be facing challenges in their relationships or in their environment. In other cases, there could be characters who are part of a mystery or a conflict. For example, in a story about a crime, the main character could be the detective trying to solve the case, or the suspect who has a complex backstory that led to their involvement in the crime.
Well, there's Holly Martins as I said before. He is naive in some ways and gets drawn into the complex web of events in Vienna. Then there's Harry Lime, who is a rather enigmatic character. He has a dark side and his actions drive much of the plot. There are also other supporting characters like the police inspector who is also involved in the investigation around Lime.
In the 'the third man story', there are often two central characters who are engaged in something, like a quest or a relationship. Then, the third man is introduced. He could be a detective in a crime - related 'the third man story' where the first two characters are suspects. Or he could be a stranger who has some connection to the past of the first two characters in a more complex narrative.
I'm not sure specifically as I haven't read it in detail. But I assume the 'Jealousy Man' is one of the main characters. There may be others who are related to him in some way, like friends or family members who are affected by his jealousy.
I'm not entirely sure without having read it in detail, but likely there are characters that represent different aspects of the society depicted in the book. Maybe there is a push man who could be central, perhaps someone who is constantly in a position of having to push forward in a difficult life.
I'm not entirely sure without reading it specifically, but typically in such a work, there would likely be an ordinary man as one of the main characters, and then perhaps a character representing the superman. There could also be supporting characters like friends, family, or antagonists.
The man upstairs is likely one of the main characters. But without reading it, it's hard to say who else exactly.
The main character is clearly the man with the scar. But there might be other supporting characters who interact with him and whose stories are also told in relation to his. Maybe a friend or a family member who has a different perspective on the man with the scar.
The Gingerbread Man is obviously a main character. And often there are animals like the fox, the cow, and the horse who are also important as they are the ones chasing the Gingerbread Man.
The Donkey Man is surely a main character. He might be accompanied by his donkey, which could also be considered as an important character in a way. There may also be characters such as the villagers or townspeople who interact with the Donkey Man. They could play important roles in the stories, for example, some might be his friends, some his foes, and others just bystanders whose lives cross paths with the Donkey Man's.
The master and the man are central. The master, who likely represents a certain social class or a set of values, and the man, who may be in a subservient position. However, in the other stories, there could be different characters like villagers, merchants or travelers that play key roles in the narrative, each with their own personalities and motives.