General Grievous is a character in the Star Wars universe and one of the secondary antagonists of the prequel trilogy and one of the main antagonists in the Clone Wars TV series.
He was primarily voiced by Matthew Wood. According to the Revenge of the Sith DVD, series creator George Lucas instructed his creative team to create a villain that foreshadowed Anakin Skywalker's transformation into Darth Vader; the heavy breathing, the cyborg body, and his seduction into a malevolent faction that hunts down and destroys Jedi.
In the ongoing Star Wars comics by Marvel Comics, he also inspires the enhancements of a rival of Darth Vader; the Imperial Mon Calamari commander Karbin, whom Vader later kills.