Introduced in 1961’s Green Lantern #7, Sinestro was once a member of the Green Lantern Corps who trained Hal Jordan how to wield the emerald light of willpower. However, because he used his power to ...
Originally introduced in 1961, Sinestro is a former Green Lantern who was dishonorably discharged after abusing his power and ends up founding his own villainous group known as the Sinestro Corps.