minor role vs persona

minor role and persona both are nouns.

Word	Noun	Adjective	Verb	Adverb
minor role	Yes	No	No	No
persona	Yes	No	No	No

As nouns, persona is a hypernym of minor role; that is, persona is a word with a broader meaning than minor role:

Other hypernyms of minor role include character, part, role, theatrical role.

minor role (noun)	persona (noun)
a small role	(Jungian psychology) a personal facade that one presents to the world
	an actor's portrayal of someone in a play