Vul Isen

Vul Isen was a Force-sensitive Givin male who served the One Sith as a scientist. Born into the One Sith on Korriban, his talents did not lie in combat, but in science, so he was never given the coveted "Darth" title. Isen worked extensively with bioweapons, and was experienced in committing genocide and ruining planets with such toxins. He found no sorrow or regret in these actions, thinking of it as a sort of game.

In 137 ABY, after Darth Krayt ordered the genocide of the Mon Calamari species, Isen was posted to the planet Dac, to work alongside overseer Darth Azard in speeding up the extermination of the Mon Calamari. Tension ran high between Isen and Azard, who felt that the Givin was a lesser Sith for not having a Darth name and disliked his inquisitive nature. Because Krayt wanted only the Mon Calamari and not any of the world's other inhabitants targeted, Isen was unable to use his experimental viral organisms which would reduce the planet to a desolate swamp world. Instead, he turned to ancient Sith lore and alchemically engineered a Sea Leviathan, the first of its kind adapted for underwater use. Isen and Azard hoped the beast would help them eliminate the remaining pockets of Mon Calamari as quickly as possible. The Leviathan led Isen and Azard to the base of the Mon Calamari Rangers, but the Sith's Aquatic Terrain Armored Transport was rammed by one of the Mon Calamari, crippling the vessel. Isen survived uninjured, but Azard was trapped under shrapnel. Using Azard's lightsaber, the Givin scientist freed him, to Azard's surprise, and the two swam toward the surface. The Leviathan was meanwhile defeated by Imperial Knight Treis Sinde and hordes of devilsquid.

A short time later, Isen was ordered to execute the Final Protocol, the elimination of the entire life on the planet, a task Isen was more than willing to complete. His actions caused the deaths of more than eighty percent of Dac's population, earning him the nickname of the "Butcher of Dac". Isen was eventually killed by Cade Skywalker after attempting to pollute the population of Utapau.

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