I'm not sure as we don't have much information, but it could be a young detective as the main character.
In 'Nancy Drew', the main character is Nancy herself. She's a resourceful and determined girl detective. In 'Enola Holmes', it's Enola, who is very independent and intelligent. And in 'Theodosia Throckmorton', Theodosia is the main character, a girl with a special connection to the ancient artifacts she deals with.
There is likely a detective as the central character. Maybe he's a shrewd and observant man.
The main character in 'the kid detective story' is the young detective. This could be a child who has a passion for solving mysteries. They might be inspired by detective stories they've read or movies they've seen. Alongside the kid, there could be other important characters. For instance, a local librarian who provides useful information about the history of the town which is relevant to the mystery. There could also be a mysterious old man who seems to know more than he lets on and whose actions are somewhat suspicious at first but later turns out to be a key to solving the mystery.
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.
The main characters are Sherlock Holmes and Dr. Watson. There is also Culverton Smith, who is the villain in the story.
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.