What are the common traits of the main character named Kid in action novels?

Often, they are brave. For example, they might not be afraid to face much stronger opponents in a fight. They also tend to be curious. Just like a real kid, they want to explore the unknown world around them, which usually leads them into all kinds of adventures and action - filled situations.

Many main characters named Kid in action novels are also very stubborn. Once they set their minds on something, like achieving a certain goal or saving someone, they won't stop no matter what obstacles are in their way. This stubbornness drives them forward in the face of danger, which creates a lot of the action in the story.

They are usually quick learners. In the heat of action, they can pick up new skills or strategies fast. Take a character like Eragon in 'Eragon' (he could be considered a 'kid' in the context of his journey starting). He had to quickly learn about magic and combat to survive his battles. Another common trait is that they are often underestimated because of their age, but they prove themselves through their actions.