What is the main character of a story called?

The main character of a story is referred to as the protagonist. This term is used to describe the central figure around whom the narrative revolves, typically facing challenges or conflicts that drive the plot forward. The protagonist is often the character that undergoes the most significant development or change throughout the story and is usually the audience's primary focus in terms of emotional investment and interest.

In contrast, the antagonist is a character who opposes the protagonist, creating conflict within the narrative. Supporting characters are those who help advance the plot and develop the main character but do not serve as the focal point of the story. The term "hero" is commonly used to describe a protagonist, especially in stories featuring themes of bravery and morality, but not all protagonists are heroes; some may be flawed or morally ambiguous. Thus, while "hero" can sometimes apply, "protagonist" is the more precise term for the main character in a story.