antagonist

n. /ænˈtæɡənɪst/ C1

对手；反面人物

A person who opposes or competes against someone, especially in a story.

仙境例句

In the whiting's song, the porpoise is the antagonist, always treading on his tail.

在牙鳕的歌里，鼠海豚是他的对头，总是踩着他的尾巴。