I don't know what story you're referring to, so I'll try my best.
Usually the main character is a good person or if it's a fable, then it could be an animal, talking plant, or other objects. But sometimes the main character is the villain or bad guy.
Edit: The story is a Korean folk tale so since I am from there, I'll help.
Usually the story is about the queen and king or princess and prince. The story is based in the palace or in the long-ago village of Korea. Sometimes the main character is a villager or a warrior.