A character archetype in novel terms is a type of character who represents a universal pattern, and therefore appeals to our human 'collective unconscious' . For example, 'hero' is the most fundamental character archetype, which directly corresponds to us each being the hero (or protagonist) of our own life story.
The purpose of the chorus is to provide background information or summarize what is currently happening in the story. Usually in the form of a song. They do not interact with characters in the story.
