well-wisher vs protagonist

well-wisher and protagonist both are nouns.

Word	Noun	Adjective	Verb	Adverb
well-wisher	Yes	No	No	No
protagonist	Yes	No	No	No

As nouns, protagonist is a hypernym of well-wisher; that is, protagonist is a word with a broader meaning than well-wisher:

well-wisher: someone who shares your feelings or opinions and hopes that you will be successful
protagonist: a person who backs a politician or a team etc.

Other hypernyms of well-wisher include admirer, booster, champion, friend, supporter.

well-wisher (noun)	protagonist (noun)
someone who shares your feelings or opinions and hopes that you will be successful	a person who backs a politician or a team etc.
	the principal character in a work of fiction