Jake Sully is a fictional character and the main protagonist in the American science fiction film series Avatar. Jake Sully served with the U.S. Marine Corps but was discharged after an injury left him paralyzed from the waist down. After learning that his twin brother Tom was killed, Jake agrees to replace him in the RDA's Avatar Program on Pandora, where humans remotely control human/Na'vi hybrids to safely navigate the planet. Lost in the Pandoran woods, Jake is attacked by a group of viperwolves when Neytiri, a Na'vi, saves him. Jake turns against the RDA after sympathizing with the Na'vi and mating with Neytiri. Jake becomes the sixth Toruk Makto and leads the Na'vi in a battle to drive the RDA off Pandora.