Well, the main character is surely the little sailboat itself. It is the focus of the story and the one that goes through all the adventures.
I'm not aware of the author of 'a boy called sailboat story'. It might be a self - published work by an emerging writer. Or perhaps it's a story that has been passed down in a particular family or group and has not yet gained wide - spread recognition, so the author remains unknown for now.
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.
Another lesson could be about adaptability. The sailboat has to adjust its sails according to the wind direction. Similarly, we need to be able to adapt to different situations in our lives. For example, when things change suddenly at work or in relationships, we should be flexible enough to handle it.
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.