Xanatos Omega

Xanatos Omega was Qui-Gon Jinn's first apprentice and a dark sider. He was, before his conversion, a very agressive and powerful Jedi apprentice. His corrupt father ran Telos IV, and was killed by Qui-Gon, pushing the twenty-seven year old to the Sith way of thinking, but was not initially Sith. He made an attempt to kill Yoda. Xanatos was supposedly killed when he jumped into in acid pool.

History
Xanatos was born on Telos in 58 BBY. He lived with his father, until the Jedi Watchman, Qui-Gon Jinn found him and took him to Courascant, where Jinn trained him. Xanatos was an agressive Jedi and longed to see his father. Then, Qui-Gon and his Padawan were called on a mission to Telos IV. It was a revolution, and Xanatos sided with his corrupt father, leaving the Jedi order. But in the intrest of the Force, Qui-Gon killed the bad ruler, and that pushed Xanatos to the dark side. The Dark Jedi began the Offworld Corporation and for at least seven months was in hiding. Then Qui-Gon popped up again and Xanatos sought his revenge. He made an assassination attempt on Yoda but was chased to Melidaa/Daan and dueled his former Master in a cave. He nearly killed himself when he jumped into an acid pool.