The character is called a supporting character
flat character
flat character
flat character
flat character
The secondary character
A foil character is a type of character who contrasts with the main character, highlighting their qualities by being their opposite. Foil characters often serve to bring out certain traits in the main character by providing a point of comparison.
If a character is not a main character, they would be a supporting character.
E. I'm not sure.
The main character is the protagonist, so his opponent is the antagonist.
E. I'm not sure.
tragedy
Books in which the main character changes are usually told from Multiple Points of View (MPV).