General Grievous

General Grievous is a major antagonist in Star Wars: Clone Wars 2003, and the secondary villain in Star Wars Episode III: Revenge of the Sith. He was voiced by John Dimaggio in the animated series and Mathew Wood in Revenge of the Sith.

Star Wars: Clone Wars
In Star Wars: Clone Wars, General Grievous's first public appearance is when he attacked several Jedi on Hypori. After killing Daakman Barrek, Grievous surrounded Tarr Seirr, Sha'a Gi, Aayla Secura, K'Kruhk, Ki-Adi-Mundi and Shaak Ti. After stating he would grant the Jedi a "warrior's death", Grievous killed Gi, and Seirr then injured Secura, Ti, and K'kruhk. He managed to possess three lightsabers (one in each hand and the third using his left foot) to fight Mundi. As they fought lightsabers blazing, clone troopers arrived to save the surviving Jedi from Grievous, though they left K'kruhk thinking he was dead.

Sometime later, Grievous searched for Supreme Chancellor Palpatine on Coruscant and fought several Jedi that took Palpatine to a secret bunker aboard a maglev train. However, Grievous and his MagnaGuards reached the hardened bunker and made his way to Palpatine. As Grievous was about to escape, Mace Windu Force-crushed his chest plates which severely damaged his lungs which gave him terrible coughing and wheezing problems.

Star Wars: Episode III - Revenge of The Sith
In Star Wars Episode III: Revenge of the Sith, General Grievous holds Supreme Chancellor Palpatine hostage aboard his flagship Invisible Hand. After a rescue operation results in Count Dooku's death at Anakin Skywalker's hands, Grievous retreats from the battle after the Jedi infiltrate his command bridge and later takes command over the Separatist Council. Now the Republic's top priority, Grievous takes refuge on the sinkhole planet Utapau, the Separatist Council's base. Under orders from Darth Sidious, Grievous relocates the Council to the volcanic planet Mustafar. After Palpatine authorizies an invasion of Utapau, Grievous engages Obi-Wan Kenobi in a lightsaber duel. When Kenobi gains an early advantage, Grievous flees the scene towards his starfighter with Kenobi hot on his heels. The chase ends at Grievous's secret hangar where the pair fight hand to hand. Making use of his robotic body, the general has the clear advantage in the brawl and prepares to kill Kenobi but the Jedi Master manages to rip open his chestplate in the process. Using the Force to pull Grievous's blaster to him, Kenobi fires five shots into the cyborg's heart, incinerating him from the inside.

Personality
General Grievous was a brilliant Separatist military strategist and a feared Jedi hunter, known for his ruthlessness and hacking cough. A twisted melding of flesh and metal, his body itself was a weapon, allowing him lightning quick strikes and devastating blows. He was also quick to retreat from a disadvantageous tactical position in battle, a tactic that worked until one final meeting with Obi-Wan Kenobi. He was also a brilliant military strategist who can't be bothered with compassion or mercy for his enemies. His lightning strikes and effective battle planning made him infamous in the eyes of the Republic, Grievous' living matter was encased within his precision-engineered artificial body; inside the hardened shell beat the heart of a remorseless Jedi killer. A pressurized gut-sack held his vital organs, while his skull-like mask contained his living eyes and brain. Each of his six-fingered arms could split in two, resulting in an array of four limbs, each armed with a lightsaber that he would take as a grim trophy of his foes. Grievous could spin these arms in a whirling storm of deadly light. Despite his imposing image, it seemed Grievous was a coward at heart, only entering into combat with opponents he believes he can defeat. This was due to invasive and manipulative brain surgery performed on him in secret by separatist scientists, and originally, Grievous was known to willingly take on seemingly impossible foes. His ruthlessness and thirst for victory at any cost made him Enemy Number One in the eyes of the Jedi Council.

Trivia

 * In both the popular T.V. show and the 3rd film in the Star Wars saga, General Grievous seems to have an alliance with Count Dooku.
 * When George Lucas was creating The Clone Wars, he needed an overpowered monster be at the at the top of the Jedi's fighting skills which proved at threat to why the Jedi were after General Grievous in the Movie. His chest was force-crushed in the Clone Wars. After this, Lucas needed a new design for Grievous in the Movie which led to the creation of General Grievous for his villainous appearance of coughing and wheezing in the Movie.
 * After that a new General Grievous was made but as a hero not a villain which is why Lucas kept that Grievous Non-Canon.
 * He appears in almost every new Star Wars game as a villain and never using his heroic counterpart.