The opposite one is "antagonist."

所有跟帖： 

• Is there anything "good" or "bad" associated? -衝浪潛水員- ♂ (0 bytes) () 09/15/2013 postreply 00:12:42

• My understanding is "they are just two sides of a conflict. -ntotl- ♂ (18 bytes) () 09/15/2013 postreply 00:18:31

• No. There are also many "bad" protagonists. -ntotl- ♂ (0 bytes) () 09/15/2013 postreply 00:23:30

• Thanks. It helps. -北京二號- ♀ (0 bytes) () 09/15/2013 postreply 19:45:37

• Thanks! -衝浪潛水員- ♂ (0 bytes) () 09/15/2013 postreply 20:24:20