Ariel is the most prominent character in the Little Mermaid story. She's the one whose desires and actions drive the plot. The prince, whose name varies in different versions, is also a main character as he is the object of Ariel's love. Ursula, the sea witch, is a major character because she sets up the challenges that Ariel has to face. Sebastian, the crab, is important as he tries to keep Ariel out of trouble in the beginning but later helps her in her quest. Flounder, Ariel's fish friend, is also a main character as he is always by Ariel's side during her adventures on land and in the sea.
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 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.
The main characters are Little Grey and Little White.
The main characters are Little Fred and Little Buck, of course.
In the 'little pig little pig story', the key characters are, of course, the little pigs. There are usually three of them. Each pig has its own personality which is reflected in how they build their houses. And then there is the big bad wolf. He is the antagonist. He is very sly and tries to catch the pigs for his meal. These characters together create the classic plot of the story.
The main characters are Little Blue and Little Yellow. They are the ones who go through various experiences in the story like playing together and getting all mixed up.
The story mainly features Little Blue and Little Yellow. They are the central figures around which the whole story revolves. Their interactions, like playing together and hugging, drive the plot forward.
Not having read the 'little by little 5th grade story', it's hard to say exactly who the main characters are. However, in a typical 5th grade - centered story, we might expect to see a young protagonist, perhaps a boy or a girl who is dealing with the typical issues of 5th graders like homework, friendships, and getting along with parents. There could also be side characters like the school bully, the kind librarian, or the strict principal that play important roles in the story's development. But again, this is just a general idea based on what we might expect from a 5th grade story.
The main characters are Stuart, a mouse, and Margalo, a bird. Also, Stuart's human family members are important characters in the story.
There might be a character named Ben who is one of the little liars. He could be a mischievous boy who often tells lies to get attention. There could also be a girl named Lily, who lies to protect her friends even though it's wrong. And perhaps there's an older character, like a brother or sister, who tries to set them straight. But again, this is all speculation without more information about the specific 'little liars story'.