The hero or the villain, e.g. (4)
I believe the answer is:
role
(Other definitions for role that I've seen before include "Function; part" , "Actor's part" , "Part in play, film etc" , "Impersonation" , "Playing part" .)
I believe the answer is:
role
(Other definitions for role that I've seen before include "Function; part" , "Actor's part" , "Part in play, film etc" , "Impersonation" , "Playing part" .)