The term "Keymaster" often refers to a character or role responsible for managing access to important locations or secrets. In various stories and games, the Keymaster holds the keys that unlock doors or pathways, symbolizing control over knowledge and entry. This character can be found in fantasy literature, video games, and even movies, where they play a crucial part in the plot. In popular culture, the most notable Keymaster is from the film Ghostbusters, where the character Louis Tully becomes the Keymaster, a pivotal figure in the supernatural events of the story. The concept of a Keymaster can also be seen in various role-playing games, where players may encounter such characters as guardians of treasure or information.