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主人公；主角；（真实事件的）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'...
塞林格的小说《麦田里的守望者》的主人公
The chief protagonists in the row are Visa and Mastercard, the world's leading credit card brands.
这场纠纷的主角是世界两大信用卡品牌——维萨和万事达。