Sinestro

Thaal Sinestro (/sɪˈnɛstroʊ/) (or simply Sinestro) is a supervillain appearing in American comic books published by DC Comics, particularly those featuring Green Lantern. Created by John Broome and Gil Kane, Sinestro is a former Green Lantern Corps member who was dishonorably discharged for abusing his power. He has since endured as the archenemy of the superhero Green Lantern and is the founder of the Sinestro Corps.