ingenue (n.)

• actor
• actress
• antagonist
• antihero
• babe
• barnstormer
• bit
• cast
• character
• child
• cue
• dove
• dupe
• feeder
• foil
• heavy
• hero
• heroine
• hick
• histrion
• infant
• innocent
• juvenile
• lamb
• lead
• lout
• mime
• mimer
• mimic
• monologist
• mummer
• oaf
• pantomime
• pantomimist
• part
• person
• personage
• piece
• playactor
• player
• protagonist
• reciter
• role
• rube
• side
• soubrette
• stooge
• stroller
• theatrical
• thespian
• trouper
• villain
• walk-on
• yokel