baddie vs persona

baddie and persona both are nouns.

Word	Noun	Adjective	Verb	Adverb
baddie	Yes	No	No	No
persona	Yes	No	No	No

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

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

baddie (noun)	persona (noun)
the principal bad character in a film or work of fiction	(Jungian psychology) a personal facade that one presents to the world
	an actor's portrayal of someone in a play