I don’t know if this is right but I think it is a metaphor if it isn’t I am sorry
Answer:
The protagonist is the main character, often a hero.
The antagonist is the character who opposes the protagonist, often a villain.
Explanation:
The protagonist is Donovan and the antagonist is Donovan's friends from "Hard Castle Middle School" .
Round- have complex personalities, represent abstract ideas, can grow or change, display a range of emotions
Flat-are standard personalities, are static and unchanging
Idk cause I’ve never read it but can u add the passage maybe