If the story is more complex, there might be other animals on the farm that interact with the black hen. For example, other hens or roosters. They could be considered main characters too if they play an important role in the story. For instance, if they are jealous of the black hen because of its special egg, or if they help the black hen in some way during the process of laying the egg.
Maybe there could be a farmer as well. Since the hen is likely on a farm, the farmer might be involved in taking care of the hen or collecting the egg. So the farmer could be another main character.
The moral could be about the value of hard work. If the black hen worked hard to lay the egg, it might teach us that effort pays off.
The main character is the little black hen. And there are other animals like the cat, the dog and the pig. These other animals don't help the little black hen in her work.
Obviously, the main characters are the man and the hen. The man could be a farmer, a villager, or just someone who has a hen for some reason. And the hen is the animal which has a connection with the man in the story.
I'm not sure without more context. It could be a mother bird if it's a story about a bird laying and protecting an egg.
I'm not entirely sure without more research, but typically in a story inspired by Bluebeard, there would be a male figure who has secrets, and a female figure who discovers or is involved with those secrets. So there might be a male and a female as main characters.
Most likely, the little big hen is one of the main characters. There might also be other animals like other hens, a rooster, or maybe some farmyard pests such as rats or mice that interact with the hen.
In the 'the wise little hen story', the main character is clearly the wise little hen. She is the one who is intelligent and hard - working. As for the other characters, they are likely to be some other barnyard animals. Maybe there are some chickens who are not as smart as her, or some other animals like a goat or a cow that could be part of the story. But they are mainly there to show the difference between the wise little hen and those who are not as responsible or hard - working.
Since I don't have detailed knowledge of 'the egg short story', the main characters could be various. It could be a group of adventurers who stumble upon a mysterious egg during their travels. One of them might be the leader, another the curious one always asking questions about the egg, and there could be a cautious member who is worried about the consequences of dealing with the egg.
Since I don't know the exact 'the big egg story', I can't say for sure. It could be a farmer if it's a story about finding an egg on a farm. Maybe some children if it's a children - centered story.
I'm not sure as the information is not given. But usually in a short story, the main characters are the ones who drive the plot forward and are most involved with the central element, which in this case is the egg.