The Irken are a fictional alien race from the animated television series Invader Zim, created by Jhonen Vasquez. They are characterized by their green skin, large eyes, and antennae. The Irken Empire is known for its militaristic and expansionist nature, often seeking to conquer other planets. Irkens are governed by a strict hierarchy, with the Tallest being the highest-ranking leaders. They utilize advanced technology and have a unique culture that values conquest and domination. The series follows the misadventures of Zim, an Irken who is sent to Earth on a mission to conquer it, despite his many failures.