The little girl in red is surely a main character. Maybe there is a villain other than the wolf, like an evil witch. And there could be a helper character, like a fairy who secretly protects her. Or it could be that her best friend at home is an important character who she is thinking about during her adventure.
The main characters are Little Red Hood, a young girl, and the wolf. Little Red Hood is the protagonist, and the wolf is the antagonist.
There are a few key characters in the story. First, there's the little girl in red, who is on her way to her grandmother's. Then there's the wolf, a very cunning character that tries to trick the girl and the grandmother. The grandmother is also an important part, as she is the one the girl is going to visit. And don't forget the hunter, who comes in at the end to save the day in most versions of the story.
Based on the title, the main character is likely the little girl in red. But without more of the story, we don't know much about her like her name, age, or personality.
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.