Obi-Wan Kenobi

"A young Jedi named Darth Vader, who was a pupil of mine until he turned to evil, helped the Empire hunt down and destroy the Jedi knights. He betrayed and murdered your father. Now the Jedi are all but extinct. Vader was seduced by the dark side of the Force."

- Obi-Wan to Luke Skywalker about how his pupil turned to evil and killed Luke's father.

Obi-Wan Kenobi is a Jedi Master in the Star Wars series of movies, he is one of the few main character to appear in all six movies and helped to train Luke Skywalker in the ways of the Force in the original trilogy while becoming one of the main protagonists of the prequels.

Star Wars Episode I: Phantom Menace
In 32 BBY, twenty-five year old Kenobi and his Master Qui-Gon Jinn headed for the planet Naboo on a mission to resolve a trade dispute. They arrived on the Trade Federation flagship Saak'ak where they were betrayed by the Trade Federation Viceroy, Nute Gunray. The two Jedi escaped to Naboo's surface and eventually met the Otolla Gungan outcast, Jar Jar Binks. Binks agreed to take the two to safety in his underwater home city of Otoh Gunga (A.K.A. Gunga City) where they were taken to Boss Rugor Nass. Jinn persuaded Boss Nass to let them go and were given both Binks (Binks swore a life debt to Jinn for saving his life.) and transportation to Theed, the capital city of Naboo.  While there, they rescued Queen Amidala from the Trade Defense Force and departed for Coruscant, the Galactic Republic's capital planet, to ask for help from the Senate. An astromech droid named R2-D2 managed to repair the Queen's starship  and they narrowly escaped an attack from Federation battleships.   Due to the damage the ship's hyperdrive sustained in the attack, the Queen's party was forced to land on the desert planet of Tatooine<span style="color: rgb(58, 58, 58);"> for repairs. Jinn decided to head to the nearest city, Mos Espa, leaving Kenobi to guard the Queen and her servants. A couple days later, Jinn returned with the necessary components for the hyperdrive and a little nine year old boy named Anakin Skywalker. Before they could reach the ship, Jinn was openly ambushed by Darth Maul (Darth Sidious' Sith apprentice) and escaped on the ship, presumably leaving Maul stranded on Tatooine. Afterwards, Jinn officially introduced both Skywalker and Kenobi.

<span lang="EN" style="font-family: "Arial","sans-serif"; font-size: 11pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"><span lang="EN" style="color: rgb(58, 58, 58); font-family: "Helvetica","sans-serif"; font-size: 11pt; mso-ansi-language: EN;">When the ship finally made its way to Coruscant, Jinn and Kenobi were greeted by Republic Senator Palpatine and were taken to the Jedi Temple, where they informed the Jedi High Council of Anakin's powerful connection to the Force. The Council then requested that Anakin be brought before them in order to judge if he was worthy to join the Jedi Order. After performing various test on Anakin, they  refused to recruit him in the Order on account of him being too old to join. Jinn then decided to train him as his unofficial padawan, despite the protests of both the Council and Kenobi. While this was going on, Queen Amidala decided to return to Naboo and confront the Trade Federation. <p style="line-height: 15.75pt;"><span lang="EN" style="font-family: "Arial","sans-serif"; font-size: 11pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"><span lang="EN" style="color: rgb(58, 58, 58); font-family: "Helvetica","sans-serif"; font-size: 11pt; mso-ansi-language: EN;">Amidala, accompanied by Jinn, Kenobi, and Skywalker, pleaded for assistance from the Gungans. Agreeing to help, the Gungans volunteered to battle the droid army on the front lines while the rest infiltrated Theed Palace.

<p style="line-height: 15.75pt;"><span lang="EN" style="font-family: "Arial","sans-serif"; font-size: 11pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"><span lang="EN" style="color: rgb(58, 58, 58); font-family: "Helvetica","sans-serif"; font-size: 11pt; mso-ansi-language: EN;">Upon successfully storming the Palace, the queen, her troops, and the Jedi were halted by Darth Maul. Jinn and Kenobi offered to face against Maul while the rest confronted Viceroy Gunray (An offer the Queen quickly accepted).

<p style="line-height: 15.75pt;"><span lang="EN" style="font-family: "Arial","sans-serif"; font-size: 11pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"><span lang="EN" style="color: rgb(58, 58, 58); font-family: "Helvetica","sans-serif"; font-size: 11pt; mso-ansi-language: EN;">As the fierce duel ensued, Jinn, Kenobi, and Maul were separated <span lang="EN" style="color: black; font-family: "Arial","sans-serif"; font-size: 11pt; mso-ansi-language: EN;">by a force field in the entrance to the Generator Room. When the force fields deactivated, Jinn and the Sith continued their battle while Kenobi remained divided from the battle by one force field when they all reactivated. Maul suddenly hit Qui-Gon Jinn on the chin with his lightsaber handle, stunning him, and then rammed his lightsaber straight into Qui-Gon's chest, mortally wounding him. <span lang="EN" style="color: rgb(58, 58, 58); font-family: "Helvetica","sans-serif"; font-size: 11pt; mso-ansi-language: EN;">

<p style="line-height: 15.75pt;"><span lang="EN" style="font-family: "Arial","sans-serif"; font-size: 11pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"><span lang="EN" style="color: black; font-family: "Arial","sans-serif"; font-size: 11pt; mso-ansi-language: EN;">Heartbroken, Kenobi redoubled his assault upon Darth Maul and chopped Maul's lightsaber in half, but the Sith almost killed Kenobi when he Force-pushed him to the edge of a melting pit. Kenobi saved himself from falling when he manages to grab onto a pipe protruding from the wall of the pit. Darth Maul then kicked the Jedi's lightsaber into the pit and prepared to finish him off. Struggling to maintain his grip, the Padawan calmed himself, using the Force to jump out of the pit and summoned his fallen Master's lightsaber to his hand. Within an instant he landed behind the surprised Maul and cut him in half, leaving the Sith's body falling into the pit. <span lang="EN" style="color: rgb(58, 58, 58); font-family: "Helvetica","sans-serif"; font-size: 11pt; mso-ansi-language: EN;">

<p style="line-height: 15.75pt;"><span lang="EN" style="font-family: "Arial","sans-serif"; font-size: 11pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"><span lang="EN" style="color: black; font-family: "Arial","sans-serif"; font-size: 11pt; mso-fareast-font-family: Calibri; mso-ansi-language: EN;">Just before passing away, Qui-Gon instructed Obi-Wan to train Anakin to become a Jedi. Obi-Wan gave his word that he will. The newly-elected Chancellor Palpatine arrived to congratulate Queen Amidala on her victory, as Nute Gunray was sent to stand trial for his crimes. <span lang="EN" style="color: rgb(58, 58, 58); font-family: "Helvetica","sans-serif"; font-size: 11pt; mso-ansi-language: EN;">

<p class="MsoNormal" style="margin: 0in 0in 0pt; text-indent: 0in;"><span lang="EN" style="font-family: "Arial","sans-serif"; font-size: 11pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"><span lang="EN" style="font-family: "Arial","sans-serif"; mso-ansi-language: EN;">After the battle, the Jedi Council named Obi-Wan a Jedi Knight. Kenobi conveyed his Master's wish regarding Anakin Skywalker to Jedi Grand Master Yoda, who reluctantly allowed him to become Obi-Wan's apprentice.

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<p class="MsoNormal" style="margin: 0in 0in 0pt; text-indent: 0in;"><span lang="EN" style="font-family: "Arial","sans-serif"; font-size: 11pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"><span lang="EN" style="font-family: "Arial","sans-serif"; font-size: 11pt; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">During Qui-Gon Jinn’s funeral, Kenobi reassured Anakin that the latter will become a Jedi under Kenobi’s tutelage.