The document discusses several characters that represent different social groups: - The villain/murderer represents a dark, mysterious, and evil social group. They are often portrayed as wearing dark clothes to seem sinister. - The detective represents the social group of law enforcers who bring justice. Detectives dress suitably in smart jackets and dedicate a lot of time to their investigations. - The victim, Jane, represents an innocent social group who lives a good life until being murdered. She is dressed smartly for work. - The assistant works under a respected authority figure like a detective and represents assistants who are professional but still adopt a rough look. They are often male-dominated roles