Guilty Spark is a fictional character from the Halo video game series, created by Bungie. He is a small, floating, blue artificial intelligence known as a Monitor. His primary role is to oversee the Halo ring installations and ensure their proper functioning. In the games, Guilty Spark often interacts with the protagonist, Master Chief, guiding him through various missions. He is known for his distinct voice and quirky personality, but his ultimate goal is to activate the Halo rings, which would have catastrophic consequences for all sentient life in the galaxy.