A flat character is a type of character in literature who does not have a complex personality or depth of character. Flat characters tend to be one-dimensional, lacking in complexity or nuance, and often serve a specific function within the story. They are typically minor characters who do not undergo significant development throughout the narrative. They may be used to provide comic relief, serve as a foil for the protagonist, or move the plot forward. Flat characters are often recognizable by their lack of depth and their tendency to conform to stereotypes or archetypes. Examples of flat characters include the damsel in distress, the mad scientist, the faithful sidekick, and the evil henchman. While flat characters may not be as engaging or memorable as more complex characters, they can still play an important role in advancing the story and creating a sense of context and setting for the reader.