The Drej are the antagonists of "Titan A.E.". They are an energy-based alien species. All of them are eyeless males, except for their ruler. Like her, they do not speak English, but rather, an alien language with English subtitles. They also intend to rid themselves of all humanity, which is why they destroyed the Earth ("A.E." standing for "After Earth"), unaware that the protagonist, Cale, was sent off.