The main characters in 'the cat and the rat short story' are the cat and the rat. The cat is often portrayed as a menacing figure, always on the prowl for the rat. The rat, in contrast, is a rather defenseless but clever character. It has to rely on its wits to survive the cat's constant pursuit.
The main characters are obviously the rat and the cat.
In the cat and the old rat story, the central figures are the cat, which represents a threat, and the old rat. The old rat has to use its intelligence to deal with the cat, so these two are the main characters in this narrative.
Since I don't know the exact 'the rat catcher short story', but most likely the main character is the rat catcher himself. There might also be rats as sort of secondary characters that play an important role in the story.
Since I don't know the specific 'rat king short story', it could be the rat king itself as a main character. There might also be other rats in the group that play important roles, like his followers or rivals.
The main characters are obviously the rat and the elephant.
The two main characters in the 'lion and the rat short story' are, as the name suggests, the lion and the rat. The lion is this majestic, strong beast that dominates the forest. The rat, on the other hand, is a tiny creature that scurries around. But their encounter and the events that follow make them the central figures in this story. The lion's initial dismissal of the rat and the rat's later heroics create the plot's main arc.
The cat chases the rat in the story. Usually, in such a story, the cat wants to catch the rat for food or just out of its natural predator - prey relationship. The rat tries to escape using its small size and ability to hide in small places.
In 'the rat and the cat short story', it might be that the rat is living in a hole and the cat discovers its hiding place. The rat then has to use its wits to escape from the cat which is much stronger and faster. For example, the rat could lead the cat on a wild chase through a maze - like house or garden, using small spaces that the cat can't easily access.
In the 'rat king story', the main characters are, of course, the rats that form the rat king. There might also be humans who discover or are affected by the presence of the rat king in some versions.
Since we don't know the exact 'rat man story', it's hard to say for sure. But likely the main character is the 'rat man' himself.