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V

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VI

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III

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I

General Grevious

General Grevious is Count Dooku's apprentice, but due to the 2 Sith rule he is not a Sith. He is depicted as a metal, droid looking creature. However he is not a droid, but a cyborg, with few of his original body parts remaining. 

During the Battle of Coruscant, at the beggining og the 3rd film, he was aboard the ship that held the Chancellor captive. As two Jedi, Obi-Wan Kenobi and Anakin Skywalker, attempted an escape with their hostage he intercepted them, fighting with them. They battled him and his Magna-Droids. Realsing he was outmatched he escaped from the ship. He was later killed by Obi-Wan on Utapau.

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II