What is the difference between the protagonist and the antagonist of a story? The protagonist displays several personality traits as the story progresses, while the antagonist reveals only two traits. The protagonist is a character who changes throughout the story, while the antagonist remains the same. The protagonist is the main character of a story, while the antagonist opposes the protagonist. The protagonist participates in most of the story, while the antagonist appears only once or twice.
The third one is correct, The protagonist is the main character of a story, while the antagonist opposes the protagonist. Pro means good, and the prefix ant- usually means opposite.