The major and minor characters or like say in Thor. Thor is the main protagonist he plays a major role in the move a minor one is like say the girls friend shes there she is part of it but if anything were to happen to her the plot of the movie would still go on. like so just with five people like heres the major roles THOR,ODEN,LOKI,FROSTGIANTS,AND THE MAIN GIRL heres some minor roles THE GIRLS FRIEND, THE PEOPLE, THE GATE KEEPER, AND THE OTHER WARRIORS
