Here are some other terms you might use:
* Protagonist: The main character, often the "hero" or central figure.
* Antagonist: The character who opposes the protagonist, often the "villain."
* Supporting characters: Characters who play important roles but are not the main focus.
* Minor characters: Characters who appear briefly and have limited roles.
* Narrator: The voice that tells the story. Sometimes the narrator is a character, and sometimes it's an outside voice.
Let me know if you have any other questions about literature!