Sinestro

Oa. As the headquarters of the Green Lanterns, it was home to many interstellar warriors who wielded green light. Yet the Green Lantern Corps was managed by a blue-skinned race that looked like a bunch of blue goblins. These beings had originally lived on a planet called Maltus, and were said to be the earliest intelligent life forms to appear in the universe. Their planet, Maltus, also possessed extraordinary science and technology.