The role of the antagonist or villain in a story, play, or film—the 'bad guy' who opposes the protagonist.
あの俳優は映画でいつも敵役を演じている。
That actor always plays the villain in films.
舞台では主人公と敵役の対決が見どころだ。
On stage, the showdown between the protagonist and the antagonist is a highlight.
彼はプロレスで巧みに敵役をこなしている。
He skillfully performs as the villain in pro wrestling.