Qui-Gon Jinn's second Padawan, Xanatos was a bright student who was frequently praised for his technical ability. On a mission to his homeworld of Telos, Xanatos betrayed Qui-Gon to his father, Telosian Governor Crion; when Qui-Gon cut down Crion in front of him, Xanatos swore revenge. He went on to fund Offworld, a mining corporation with a hand in numerous illegal concerns galaxy wide, and made several attempts to get his revenge on Qui-Gon, including trying to blow up the Jedi Temple and steal the treasury. Cornerned on Telos, Xanatos ultimately committed suicide rather than be captured.
Corrupt Corporate Executive: Offworld trafficks in slaves, kills those who get in its way, buys out governments, and does more environmental damage in one day than most Captain Planet villains did in the show's entire run.
The Corrupter: To Bruck Chun in The Captive Temple and the entire planet of Telos in The Day of Reckoning.
A renegade Mad Scientist with a passion for discovery, Jenna Zan Arbor arranged for Qui-Gon Jinn's kidnapping at the hands of the Bounty Hunter, Ona Nobis so that she might gain a better understanding of the Force. Qui-Gon's apprentice Obi-Wan Kenobi rescued him and captured Arbor, though not before the scientist had both tortured Qui-Gon, and attempted to wipe out the entire world of Belasco with a genetically engineered bacterium. Escaping custody, Arbor had several run-ins with Obi-Wan and his apprentice, Anakin Skywalker, before allying herself with Granta Omega in a bid to brainwash the Senate. Omega was killed, but Arbor escaped and went on to manufacture numerous weapons for first the Confederacy of Independent Systems, and then the new Galactic Empire. She was eventually mindwiped by Lina Naltree, and finally killed by Darth Vader for her failure.
Fate Worse Than Death: Her memory is wiped, and she loses knowledge of all her experiments, and the fact that she was once a brilliant scientist. Perhaps fortunately for her, Vader executes her soon afterwards.
Xanatos' illegitimate son, Granta Omega is a Force Blank: a being with no connection whatsover to the living Force. Having inherited his father's wealth, and his hatred for the Jedi, Omega embarks on a campaign against the Jedi Order and the Old Republic. He makes several attempts to kill Obi-Wan and Anakin, arranges massacres and flare-ups across the galaxy, and takes down several other Jedi along the way, before meeting his end at Obi-Wan's hands.
Avenging the Villain: Wants revenge for his father's death, which he refuses to accept as a suicide.
Diabolical Mastermind: A very well-connected crimelord, with multiple identities, and links to the Hutts, various Bounty Hunter organisations, a number of renegade Mad Scientists, and the Confederacy of Independent Systems, in addition to his ownership of Offworld. A firm believer in spending money to make money, he's more than willing to put contracts on the Jedi, attack the Senate with a mind-control weapon, and plot the destruction of an entire planet through civil war, and biological weaponry.