The "Star Wars" films have several Jedi characters in significant roles, such as Luke Skywalker, Yoda, Obi-wan Kenobi, Qui-gon Jinn and Mace Windu. The latter two only appear in the prequel trilogy. "Star Wars" features many Jedi characters, or warrior monks trained with lightsabers and the use of the Force.
Luke Skywalker is a moisture farmer on the planet Tatooine, living a simple life until he meets Obi-Wan Kenobi, who informs him of his special Jedi heritage. Luke is the son of Anakin Skywalker, the former Jedi Knight who became Darth Vader. Obi-wan had trained Anakin when he was young, Luke becomes the last of the Jedi and eventually recrates the Jedi Order, while Obi-wan dies at the hands of Darth Vader during "A New Hope."
Yoda is the ultimate Jedi Master, a former leader of the Jedi Council and eventual teacher of Luke. He had also taught Obi-wan and Qui-gon. Yoda is the oldest character in the films and the most powerful, demonstrating such feats as and lifting Luke's X-wing fighter from the swamps of Dagobah.
Qui-gon is Obi-wan's teacher and only appears prominently in "The Phantom Menace." The Sith Lord Darth Maul kills Qui-gon at the end of the film.
Mace Windu is a popular Jedi, and the only one who wields a purple lightsaber. In the prequel films, he is equal in standing to Yoda, and he dies while fighting Darth Sidious after Anakin betrays him.