protagonist
n
1
(a) (fml 文) chief character in a drama; hero (戏剧的)主角.
(b) chief person in a story or chief participant in an actual event, esp a conflict or dispute (故事的)主人公; 现实事件(尤指冲突或争端的)主要参与者, 主要人物.
2 ~ (of sth) leader or advocate of a cause 领导者; 倡导者; 拥护者
an outspoken protagonist of electoral reform 对改革选举制度直抒己见的鼓吹者
a leading protagonist of the women´s movement 妇女运动的领导者.