When a writer uses a minor character solely to represent a particular social group or type without individualising that character, the character is described as

A stock character is a stereotypical, flat figure who represents a recognisable social type or role without being developed as an individual with complex, unique traits. Examples include the corrupt politician, the village gossip, or the loyal servant. An archetypal character embodies universal human patterns from mythology and collective experience, while a round character is complex and fully developed, and a dynamic character undergoes change.