The main characters in Truman Capote's "In Cold Blood" are
Perry Smith and Dick Hickock, the two men who murdered the Clutter family. While the book focuses on the crime and its aftermath, the narrative delves deeply into the lives, personalities, and motivations of Perry and Dick, making them the central characters.
However, the book also explores the perspective of the Clutter family, particularly Herb Clutter, the patriarch, and Nancy Clutter, the daughter. Their story adds a layer of tragedy and humanizes the victims, further emphasizing the devastating impact of the crime.