名词

1. 提倡者；拥护者
Someone who is a protagonist of an idea or movement is a supporter of it.

2. 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.

1. the principal character in a work of fiction

Synonym: agonist

2. a person who backs a politician or a team etc.

e.g. all their supporters came out for the game
they are friends of the library

Synonym: supporterchampionadmirerboosterfriend