Based on the title, the main characters are likely to be rats. And since it's about a 'new cap', perhaps the cap could also be considered a sort of character in the sense that it has an impact on the rats' story.
I'm not sure specifically what the 'rats new cap story' is about as the title is rather ambiguous. It could potentially be a story about rats and a new cap that they encounter, perhaps it's a fable where the cap plays an important role in the rats' adventures or daily life.
In the 'man and monkey cap story', the two main characters are the man and the monkey. The man might be a simple - minded or kind - hearted person who is just minding his own business. The monkey is the source of action and disruption as it becomes fixated on the man's cap. Their interaction forms the core of the story, whether it's a story of conflict as the man tries to get his cap back from the monkey or a more harmonious one where they reach an understanding about the cap.
The main characters in the 'Little Red Cap' story are Little Red Cap herself and the wolf. Little Red Cap is a young girl, and the wolf is the villain who tries to deceive and harm her.
Since I don't know the exact 'rats short story', it could be the rats themselves. Maybe there's a brave rat that leads the group, or a young rat that is learning about the world around it.
Since I don't know the exact 'ghost rats story', it could be the rats themselves as the main characters. They might be led by a particularly large or intelligent 'ghost rat'.
The main characters are Little Red Riding Hood herself, a young girl. And of course, the wolf, which is the villain in the story. Also, there is Little Red Riding Hood's grandmother who is in danger because of the wolf.
The main characters in the 'Little Red Cap Grimm Story' are quite distinct. Little Red Cap is a little girl, often depicted as kind - hearted and naive. She is on her way to visit her grandmother. The wolf is a cunning and hungry predator. It uses its wits to deceive Little Red Cap and get to her grandmother. The grandmother is an old and frail character, who is ultimately the target of the wolf's evil intentions. These three characters drive the story forward with their interactions.
The main character is the man who decides to rob the graves in the graveyard full of rats.
Most likely the two lab rats in love are the main characters. But there could also be some supporting characters like the scientists who take care of them or other lab animals.
The main characters in this 'a village full of rats story' are the villagers for sure. They are the ones facing the situation of a rat - filled village. But also, there might be a character like a clever hunter or a wise old woman in the village. The hunter could be trying to catch the rats in his own creative ways, like using special traps or his hunting skills. And the old woman might have some traditional knowledge about how to keep rats away, like using certain herbs or making specific noises. So these could be the main characters in the story.