The walking boy is definitely one of the main characters. There could be his family members as well, who might be part of the reason he starts walking. For example, if he has a conflict with his parents, they could be important characters in the background. And then there could be characters in the places he visits. Maybe a shopkeeper in a small town he passes through, or a hermit living in the woods. These characters could interact with the boy and influence his journey.
As I don't know the exact story, it could be the dog and its owner as the main characters. They are the ones directly involved in the act of walking the dog.
Rick Grimes is often a main character in the 'The Walking Dead' universe, so he might be one of the main characters in the short story as well.
The main characters are the boy and the mermaid.
The main characters are clearly the wolf and the boy.
The main character is the lost boy. He is at the center of the story. There could be other important characters such as his family members, who might be the reason for his being lost, or the people in the place where he is lost. For example, if he is lost in a forest, there could be forest rangers or local tribespeople who play significant roles in his story. They can either assist him in finding his way back or pose more challenges for him.
Most likely, the naughty boy himself is a main character. There may also be his parents or guardians who have to deal with his naughtiness.
Well, obviously, the honest boy is one of the main characters. There might also be his parents or guardians, as they could play a role in shaping his values of honesty. And perhaps there are some other children or adults in the story who interact with the boy and are affected by his honesty or lack thereof.
Obviously, the main character is the greedy boy. But there could also be other characters like his parents, who might be trying to teach him not to be so greedy. Or his friends who are affected by his greedy behavior.
The invisible boy is the central character. There could be other characters like peers at school. Some of them might be the popular kids who are so self - involved that they don't notice the invisible boy. Then there might be an outcast like himself who he forms a bond with, or a more empathetic character who helps him to become 'visible' again, whether it's through friendship or some other form of connection.
Most likely, the bad boy himself is one of the main characters. There might also be a teacher or a parent who tries to discipline him.