Since it's the 'little levi story', Levi is probably the central character. There could be other characters like an old wise man who gives Levi advice when he's in trouble. Maybe there's also a girl who is Levi's neighbor and they go on adventures together. Without more information, it's hard to be certain about all the main characters.
Well, given that it's called 'little levi story', Levi is likely to be a main character. There may be some antagonist characters as well, perhaps a mean - spirited classmate or a villain in a more fantastical version of the story. And then there could be supporting characters such as Levi's teacher who helps him learn important values, or his pet if he has one that accompanies him on his journey in the story.
As I don't know the details of the 'little levi story', I can't say for sure who the main characters are. But I would assume Levi is one of the main characters. There might also be his parents or a best friend who plays an important role in the story.
Typically, Levi the dragon is a main character. There might also be a human sidekick or a group of adventurers that Levi teams up with.
I don't have enough details about 'the little story' to say for sure, but it could be a child, a pet, or an old wise man.
In the chicken little characters story, the key character is Chicken Little, the one who believes the sky is falling. Another important character is Foxy Loxy, a rather sly animal. There are also other barnyard animals like Henny Penny and Ducky Lucky who are involved in Chicken Little's adventure when he spreads the word about the sky falling.
The main characters of 'little busters main story' are the boys and girls who form the Little Busters. Riki Naoe is a central character, being somewhat of a narrator in a way as we see the story through his perspective at times. Kyousuke Natsume is a charismatic figure in the group. Then there are other members like Masato Inohara and Kengo Miyazato. The female characters such as Rin Natsume also play significant roles in the story, adding different dimensions to the relationships and the overall plot.
In this unknown 'the little boy story', aside from the little boy, there could be a wise old man in the neighborhood. The old man might act as a mentor to the boy, guiding him with valuable advice through different situations in the story.
The little shoemaker is the central character. He is the one whose story we are following. He could have a family in the story, although they may not be as prominent. There may also be some local townspeople who play a role in the story, perhaps as observers of his work or as people who are influenced by his shoes. But the main character, the one who drives the plot forward, is the little shoemaker.
In the little caterpillar story, the key character is the little caterpillar. There may be other elements in the story like the leaves it eats, which are not really characters but important parts of its environment. But the focus is on the little caterpillar's journey from being a small crawler to a butterfly.
The main characters are Ariel, a mermaid princess who is curious about the human world. Then there is Prince Eric, the human prince Ariel falls in love with. Ursula, the evil sea witch who makes a deal with Ariel. And King Triton, Ariel's father who rules the underwater kingdom.
In the '3 little mice story', the principal characters are the three little mice. These mice are likely to have different personalities. One might be brave, another cautious, and the third clever. And there could be other supporting characters like a big bad snake that they have to avoid or a friendly squirrel that shows them where to find nuts.
The main character is Little Thumb. His brothers also play important roles as they are part of the group that goes through the adventures together. And of course, the ogre is a significant character as he is the main source of danger in the story.