Tonnis Gorek was a batarian slaver who engaged in a series of increasingly daring raids on Systems Alliance colonies in the late 2170s. Gorek's luck ran out during an attempted raid on the Alliance colony on Xanti, where he encountered an unexpectedly large garrison of Alliance marines. Although Gorek escaped, most of his crew was killed, and the incident forced him out of the slaving business. Despite the end of his slaving career, he remained wanted throughout Citadel space.

Following the Xanti incident, Gorek developed gambling and substance abuse problems. In 2186 CE, he was gunned down by three assailants while walking out of Omega's Afterlife nightclub. It is not known who killed him, though the former slaver had many enemies.