fictional character vs Little John

fictional character and Little John both are nouns.

Word	Noun	Adjective	Verb	Adverb
fictional character	Yes	No	No	No
Little John	Yes	No	No	No

fictional character (noun)	Little John (noun)
an imaginary person represented in a work of fiction (play or film or story)	legendary follower of Robin Hood; noted for his size and strength