Darth Maul
Darth Maul was the first apprentice of the Sith Lord, Darth Sideous. He is most notable for his double-bladed lightsabre, his acrobatic combat techniques and his red and black face and horns.
He was dispatched by his master to locate Queen Padmé Amidala who had slipped through the grasp of the incompetent leaders of the Trade Federation. He forged a distress call from Sio Bibble to trick someone on the Queen's starship to respond so he could trace the signal to its position on Tatooine. Once on the planet he dispatched probes to search for the Queen's or ship's exact location. He raced to the scene just as the ship was taking off again.
Sideous then orders his apprentice to Naboo to wait for the Queen there. When Amidala leads an attack on the Theed palace, Maul intercepts the small band and engages their two Jedi knights in battle. He is able to hold his own against Qui-Gon Jinn and Obi-Wan Kenobi together. However, once he has Qui-Gon isolated, he is able to kill the Jedi Master.
Obi-Wan, enraged at the death of his friend, initially catches Maul off guard and is able to cut the Sith's saber in two. Maul quickly recovers and uses the Force to push Obi-Wan over the edge of the shaft. However, Maul makes the same mistake that most villians make and takes a moment to gloat over his prey, knocking Kenobi's sabre down the shaft. Obi-Wan seizes the moment to fling himself out of the shaft, retreives his master's sabre and slices Maul in half. The last we see of the apprentice are the two halves of his body falling down the apparently bottomless pit.