Green Lantern is a title used by multiple fictional characters in the DC Universe, rather than a single individual. The most famous version is Hal Jordan, a test pilot chosen by the Green Lantern Corps to wield a power ring fueled by willpower. As a superhero, Green Lantern serves as an intergalactic law enforcer, protecting Earth and the wider universe from cosmic threats, criminals, and tyrants. The character is known for creating energy constructs and for playing a major role in Justice League stories.