The main character is likely the 'superfluous man' himself. Since it's his diary, he would be central to the story.
I'm not entirely sure who all the main characters are as I haven't read the book in great detail. But the 'superfluous man' is definitely a key figure. There could be some characters that represent different aspects of society that he has to deal with, like an employer if he has a job, or a love interest if there is a romantic sub - plot in the stories.
One of the main themes could be alienation. The 'superfluous man' concept often implies a sense of being out of place in society. Another theme might be self - reflection, as the diary form usually involves the character looking inward.
Well, the most obvious main character is the invisible man himself. He is the one whose experiences and thoughts are being chronicled in the diary.
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.
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.
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.