fictitious character vs John Henry

fictitious character and John Henry both are nouns.

Word	Noun	Adjective	Verb	Adverb
fictitious character	Yes	No	No	No
John Henry	Yes	No	No	No

fictitious character (noun)	John Henry (noun)
an imaginary person represented in a work of fiction (play or film or story)	hero of American folk tales; portrayed as an enormously strong black man who worked on the railroads and died from exhaustion after winning a contest with a steam drill