staple character

(writing, theater, film) A stock character, especially one that is overused.

Japanese Meaning

文学、演劇、映画などにおける定型的で使い古された（ステレオタイプな）キャラクター

In many romantic comedies, the grumpy-but-kind neighbor ends up as a staple character.

多くのロマンティック・コメディでは、ぶっきらぼうだけれど心優しい隣人が定番の登場人物になってしまう。

Sense（1）

(writing, theater, film) A stock character, especially one that is overused.

The mad scientist was a staple character in many horror films.

staple characters

（ plural ）