Darth Krayt, born A'Sharad Hett, was a Human male who served as a Jedi Knight in the waning days of the Galactic Republic. The son of legendary Jedi Knight Sharad Hett, he eventually became the Padawan of Jedi Masters Ki-Adi-Mundi, and later, An'ya Kuro. When he was only a teen, Sharad Hett was murdered by the Jedi assassin Aurra Sing, who was later defeated in a duel by a young A'Sharad Hett.
During the Clone Wars he served the Republic as a General, and established himself as a charismatic leader who often led his troops from the front. He eventually became friends with the young Anakin Skywalker and helped Anakin come to terms with the destruction which had been wrought by the galaxy-wide war. A'Sharad took part in key conflicts during the war such as the Battle of Boz Pity and Mission to Saleucami. He managed to survive the Clone Wars, and was one of the few Jedi known to have escaped the Great Jedi Purge in 19 BBY.
A'Sharad Hett eventually made his way back to his homeworld of Tatooine where he vowed to wage a private war against the new Galactic Empire. However, after a confrontation with Jedi Master Obi-Wan Kenobi, he was exiled from Tatooine and later discovered that it was Anakin Skywalker who became the Sith Lord Darth Vader, who had murdered the Jedi Order. A'Sharad blamed himself for the destruction of the Jedi Order and became a bounty hunter. During one of his missions, he found himself on Korriban, where he trained as a Sith by Dark Lord XoXaan. Hett eventually fell to the dark side after capture and torture by the Yuuzhan Vong and soon proclaimed himself Dread Lord and Dark Lord of the Sith, taking the name "Darth Krayt". As Krayt, he became the founder and leader of the One Sith.
As Krayt, he rebuilt the Sith Order and kept its existence hidden from the Jedi by cloaking their presence on Korriban. To survive, Krayt spent many years in stasis before reemerging to form an alliance with Moff Nyna Calixte and to spark the Sith-Imperial War that led to the destruction of the Galactic Federation of Free Alliances. At the climax of the war, Krayt deposed Emperor Roan Fel and brought about the murder of the current Jedi Order.
Darth Krayt ruled the galaxy with an iron fist for seven years before the alliance between Roan Fel and Galactic Alliance admiral Gar Stazi threatened his rule. Furthermore, Krayt discovered the existence and survival of a Skywalker: Cade. Krayt feared that with these deteriorating conditions and his bad health would lead to his demise before his dream was finished, and sent about the hunt for Cade Skywalker. However, during a skirmish on Had Abbadon, Krayt was stabbed and sent hurtling off a cliff. The Sith Lord's powers proved strong, however, when they saved his life. Darth Krayt was then approached by Darth Wyyrlok (his most trusted advisor) who murdered Krayt, believing the Dread Lord would lead to the Sith Order's destruction.
