The Indigo Tribe is one of the ten Lantern Corps that draw power from the Emotional Electromagnetic Spectrum. The original was the Green Lantern Corps, and the Indigos have been allies to the super-hero Green Lantern. Their power rings channel the emotion "compassion," and the Indigos are chosen from among the universe's greatest sociopaths to rehabilitate them. They are a tribe of wanderers with a home on the planet Nok, and their representative entity is Proselyte. Indigo-1 was their original leader. The Indigo Tribe was created by Geoff Johns and Ivan Reis, first appearing in Green Lantern (Volume 4) #25. (2008)