A "hollow character" refers to a fictional character who lacks depth, complexity, or emotional resonance. These characters often serve a specific purpose in a story but do not undergo significant development or transformation. They may be one-dimensional, relying on stereotypes or clichés, which can make them less relatable or engaging for the audience. In literature and film, hollow characters can detract from the overall narrative, as they may not evoke empathy or interest. Examples include certain protagonists or antagonists who fulfill a role without offering insight into their motivations or backgrounds, making them feel flat and unmemorable.