Commander Rezi Soresh was a Human male officer in the Galactic Empire and the man who created X-1, X-2, X-3, X-4, X-5, X-6, and X-7 in an attempt to create the perfect assassin. Of the seven, X-7 was the only one to survive his training. Soresh was hired by the Emperor to kill the pilot who had destroyed the Death Star. When he failed, he fled Darth Vader's wrath and settled in the Outer Rim Territories. During his attempt to turn young Skywalker into his own assassin and gain his revenge, Soresh was gunned down by Han Solo.