What is the role of the antagonist in a story

The antagonist acts as the bad guy.

Explanation:

Protagonist and antagonist and are nouns that refer to characters in a story. The protagonist is the main character, often a hero. The antagonist is the character who opposes the protagonist, often a villain.

The antagonist is the character in the story who opposes the protagonist which is the main character of a literary work. The antagonist does not change throughout the story which means the character is static. Most of the time, the antagonist is known as the "bad guy."