Answer:
Antagonist
Step-by-step explanation:
Protagonist: The main character of the story. This is the character who experiences the main conflict and has to solve it. It is the character driving the story. The character can be good or evil.
Antagonist: The character who causes problems in the story. This does not have to be a bad person. The antagonist simply creates the conflict for the protagonist, intentionally or unintentionally.