A Sith Lord is a title used in the Star Wars universe to describe a powerful user of the dark side of the Force. Sith Lords are often characterized by their ambition, desire for power, and mastery of dark side abilities. They typically serve as leaders of the Sith Order, which opposes the Jedi, the guardians of peace and justice in the galaxy. Sith Lords are known for their iconic red lightsabers and often wear dark robes. Notable Sith Lords include Darth Vader and Emperor Palpatine, both of whom played significant roles in the conflict between the Sith and the Jedi throughout the Star Wars saga.