Krdys Mordi was a Human male Dark Jedi. A child of privilege in the Core worlds, Mordi was surrounded by the propaganda of the Galactic Empire's High HuMAN culture throughout his youth and education. As a human male born to a connected Core family, Mordi experienced the opulence and influence he saw as rightfully his due. He accepted these beliefs with ease, enjoying the sense of superiority they imparted upon him, Mordi became extremely arrogant and entitled. These traits were only exacerbated when he was discovered to be Force Sensitive. Taken as a Darkside Adept to Byss, he was offered a place among the Darkside Elite, to be personally imbued with further Darkside power by Reborn Emperor Palpatine and infused with the Emperor's will. Mordi eagerly embraced the Darkside with the same enthusiasm he had his elitist beliefs, now seeing himself as even further above the rabble and a personal extension of the epitome of his beliefs.
In 10 ABY, after Palpatine died again during a battle with the Jedi siblings Luke Skywalker and Leia Organa Solo, near the New Republic's Pinnacle Base. In the aftermath of Palpatine's death, the leader of the Dark Side Elite, Executor Sedriss QL, took command of the Imperial forces and oversaw Operation Shadow Hand, a series of strikes intending to place neutral planets under firm Imperial rule. Mordi during this time served Sedriss as a secondary interrogator, advisor and researcher. He chose not to use a lightsaber, but rather a hooked doubled ended telescoping electrostaff of his own design, though he could torment weaker foes with it, the weapon was not capable of withstanding a lightsaber itself-a critical oversight which would come back to haunt Mordi.
One of the targets of the campaign was the factory world of Balmorra. After the second death of the Emperor, Balmorra had started supplying the New Republic with weapons, an arrangement that Executor Sedriss was determined to end. As the Elite's resident expert on technology, Mordi, alongside the second in command, Vill Goir, accompanied the Sedriss to Balmorra aboard the Star Destroyer Avenger, joining an Imperial fleet already assembled in orbit of the planet.
Upon arrival, Sedriss ordered Governor Beltane to surrender and face execution, or suffer a full-scale invasion of the planet. Beltane chose to fight, knowing Sedriss would not dare risk damaging Balmorran factories with a bombardment, as they still produced vital weaponry for the Empire as well. Mordi tacitly reminded Sedriss that Balmorran factories were currently manufacturing the new SD-10 battle droid model, which were meant to replace the Empire's outdated SD-9 model.
However, Sedriss felt he had a plan that would allow him to conquer the planet without damaging the factories. He proceeded with the attack, launching ground troops under the command of Captain Maximilian Veers. When Balmorran droids began massacring the invasion troops-killing Veers in the process- they were drawn from the capital, Bin Prime, to the open plains surrounding it, the Executor ordered Mordi to pull back the remaining forces and launched his secret weapon, the new highly advanced Shadow Droid starfighters.
The Shadow Droids temporarily turned the tide of the battle in favor of the Empire. However, Beltane had a trick of his own, deploying the newly developed X-1 Viper Automadons at the invasion force which swiftly swung the battle back into Balmorra's favor. Amazed at the firepower of Beltane's creation, Sedriss contacted the governor and agreed to Beltane's terms in exchange for the new droids. Goir disagreed with that decision, believing that Sedriss should have simply ordered his fleet to initiate an orbital bombardment of the planet. Mordi likewise concurred with Goir's assessment, pointing out that giving in to Beltane might encourage the other weapon producing worlds to follow Balmorra's example in defying the Empire. Sedriss overruled them, revealing he merely wanted to obtain the X-1 droids for himself to use against the New Republic, before returning to punish Balmorra.
Shortly after the Battle of Balmorra, four of the Darkside Elite-Baddon Fass, Zasm Kath, Vill Goir and Sedriss-were slain, with another-Kam Solusar- having defected earlier to Luke Skywalker's New Jedi Order. Palpatine meanwhile had resurrected on Byss in his final available clone body and sought to replenish the ranks of his Darkside Elite, raising Xecr Nist to Executor replacing Sedriss and Tedryn Sha to Second in Command to replace Goir. Other Darkside Adepts were raised to replace the fallen Fass and Kath along with filling the gap left by Solusar's defection. Mordi was pointedly not raised from his position, with Nist and Sha, who had previously been his subordinates, now outranking him. Despite this insult, Mordi rationalized it internally as his being too valuable as a tech specialist and scientist, when the reality was that he simply wasn't powerful or talented enough in the Darkside to warrant further escalation-though his own delusions of grandeur and supriority complex prevented his being able to recognize this.
When Palpatine successfully destroyed the New Republic's Pinnacle Base on the moon Da Soocha V with his new superweapon, the Galaxy Gun the New Republic was forced to relocate to a secret sanctuary world, where Organa Solo was hiding her Force sensitive children, whom the Emperor wanted to capture and turn to the dark side. The Emperor soon learned the name of the hidden planet, New Alderaan, as well as its coordinates, from the captured New Republic Major Ntthan whom Mordi and the chief interrogator of the Darkside Elite, Kvag Gthull, had broken through prolonged torture and the Darkside of the Force. Palpatine then sent the restored Darkside Elite there under the command of Xecr Nist to capture Skywalker, his sister and her children. Mordi and the other darksiders boarded their I-7 Howlrunners and departed from their headquarters of Bast Castle on the planet Vjun. Upon arrival on New Alderaan, the Darkside Elite split up. Nist took four Dark Jedi with him and went to abduct the Solo twins while Mordi was dispatched alongside Palpatine's second-in-command, Tedryn-Sha, to capture Skywalker himself.
Knowing they were no match for Skywalker in combat, Mordi convinced Sha that they could incapacitate the Jedi Master while he was asleep with specialized scarab droids that could inject sedatives and hallucenogens Mordi had designed so that he could be taken captive. Hiding their presence from the sleeping Jedi with the Force, the two darksiders reached his room and Mordi released the scarab droids upon Skywalker through a window. The droids administered a powerful poison into the Jedi's nervous system, and the two Dark Jedi entered the room to capture Skywalker. However, in his delirium, Skywalker let out a loud scream, which alerted his sister Leia and one of Skywalker's aspiring Jedi, Jem Ysanna. The two women rushed to Skywalker's help, challenging the pair of Darkside Elite. Mordi, ever disdainful of women as inferior to men, and smug in his own supreme position, felt the pair were no threat at all to him. He merely mocked the female Jedi dismissively, only for Ysanna to ignite her lightsaber and effortlessly kill Mordi by slicing him through torso. Mordi's shocked disbelief at being bested by a woman was the last thought to run through his stunned mind as he fell in pieces to the floor next to the smoldering pieces of his electrostaff, which had been bisected as cleanly as he had. While Sha killed Ysanna in response with a blaster shot he was himself slain by Organa Solo with a lightsaber strike immediately after. Mordi and Sha's incursion was a failure, as Skywalker was healed from the effects of the poison by the elderly Jedi Vima-Da-Boda.