protagonist
n
1
(a) (fml 文) chief character in a drama; hero (戲劇的)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; 現(xiàn)實事件(尤指沖突或爭端的)主要參與者, 主要人物.
2 ~ (of sth) leader or advocate of a cause 領導者; 倡導者; 擁護者
an outspoken protagonist of electoral reform 對改革選舉制度直抒己見的鼓吹者
a leading protagonist of the women's movement 婦女運動的領導者.