A character who doesn't change, it is the opposite of a dynamic character.
A supporting character, a peripheral character, a foil, a one-dimensional, cardboard, flat character.
No, Athena is not a flat character. She actually is a round character.
Round character - a complicated hero; flat character - the hero's simple sidekick
A Round Character
a round character is a character in a story that changes his/her personality or actions as the story unfolds. a flat character is the opposite. (:
A flat character is uncomplicated and doesn't change during the course of the story. Vizzini is a flat character in the princess bride as his character doesn't change in story. *A car salesman who tries to bully people into buying a car.
It's not a good idea to have a flat character be a major character. You want your major characters to be well-rounded and have actual personalities instead of just being stereotypes.
a plat charactor
A character who may be described in a sentence or two is called a flat character. They are minor characters who do not need a lot of description.
Flat
Ebenezer Scrooge from "A Christmas Carol" has an external conflict with his own past choices and attitudes, as well as with the spirits who visit him to show him the impact of his actions on others. This conflict drives the story's plot and leads to Scrooge's transformation.
the character is flat