Darth Vader () is a fictional character in the Star Wars franchise. He was first introduced in the original film trilogy as one of the leaders of the Galactic Empire. The prequel trilogy chronicles his transformation from the Jedi Knight Anakin Skywalker into the Sith Lord Darth Vader. His metamorphosis begins when he is lured to the dark side of the Force by Chancellor Palpatine, who later becomes the Emperor. After a lightsaber battle with his former mentor Obi-Wan Kenobi, Vader is severely injured and is transformed into a cyborg.
https://en.wikipedia.org/wiki/Darth_Vader