N-COUNT
主人公；主角；（真實事件的）主要人物
A protagonist in a play, novel, or real event is one of the main people in it.
例句
...the protagonist of J. D. Salinger's novel 'The Catcher in the Rye'...
塞林格的小說《麥田里的守望者》的主人公
The chief protagonists in the row are Visa and Mastercard, the world's leading credit card brands.
這場糾紛的主角是世界兩大信用卡品牌——維薩和萬事達(dá)。