I'm not familiar with this story, but it might have characters like the person who sells the little red mustang to the protagonist. There could also be friends or family members who are involved in the story because of the mustang, for example, a father who helps the main character fix the car or a best friend who goes on rides with the main character in the mustang.
The 'little red mustang story' could cover a wide range of topics. It might be a story of a young person's first car being a little red mustang and all the memories associated with it, like the freedom it brought, the friends they made while driving it, and the places they went. It could also be a story set in a specific era, where the little red mustang was a popular or rare vehicle, and the story revolves around the people who interacted with it, whether it was a love story, a story of rivalry, or a story of self - discovery while on the road in that mustang.
If the 'little red flower story' is about a journey, the main character could be a traveler who comes across the little red flower during their travels. Along the way, they might meet other people or characters, like a local villager who tells them the significance of the little red flower in that area.
The main character is the little red engine. There are also the toys and good things in the train it has to pull.
The little girl is the central figure in the little red shoes story. And there are also some other characters like the shoemaker who made the red shoes. However, the little girl's story with the red shoes is what the whole story is mainly about.
If the 'little red children story' is a story about a group's journey, then the main characters could be the bravest or the most curious among the little red children. For example, there could be a child who is always coming up with ideas to solve problems they encounter during their adventure. And also, there might be an older child who looks after the younger ones in the group.
I'm not certain about the main characters in 'the little red pen story'. It could be a group of students who all have a connection to the little red pen. One student might be the one who always uses it, another might be jealous of that student for having it, and a third might be the one who accidentally breaks it and then tries to fix it. Or it could be a story about an artist who uses the little red pen as their favorite tool and the people they meet while using it in different locations.
The main character is surely the little red elf. There may also be other elves as side characters.
Grandma is also an important character. She is the one that Little Red Riding Hood is going to visit, and she gets eaten by the wolf first. Little Red Riding Hood is known for her red hooded cape that gives her the name. She is often depicted as a kind and naive girl. The wolf, on the other hand, is cunning and hungry, using trickery to get what he wants.
Since we don't have much information about the 'little red coat story', it could be that the main character is a girl or a boy who wears the little red coat. There might also be some supporting characters like the child's parents or friends.
The main character is surely the little red kite. It's what the story is centered around. Additionally, there may be elements in the story that can be considered as characters in a sense. For example, the wind. The wind is like a character that interacts with the little red kite. It can be a friendly force that helps the kite fly higher or a challenging one that tries to knock the kite off course. And the person flying the kite is also a crucial part of the story as they are directly involved with the little red kite's adventures.