Atrocitus

Atrocitus (Atros) is a supervillain appearing in American comic books published by DC Comics. Atrocitus is an enemy to the Guardians of the Universe and Sinestro, their former Green Lantern. He is the leader of the Red Lantern Corps, which embodies the emotion of rage and anger. He served as the main antagonist of For the Reds during Guy Gardner's tenure in their numbers, especially during the "Atrocities" arc. After losing his family from the massacre of Sector 666, Atrocitus swore vengeance against the Guardians of the Universe. He would come across the other lantern corps, more prominently the Green Lantern Corps.

In most forms of media, he serves as a major antagonist towards the Green Lanterns (because of his hatred towards the Guardans), but at times he has been more of an anti-villainous or anti-heroic character, even at times siding with his former enemies against a bigger threat.