Short answers, pulled from the story.
George Lucas created Obi-Wan Kenobi, writing and directing the 1977 film that introduced him as a mentor for Luke Skywalker. Lucas also wrote the character's later prequel-era appearances, beginning with The Phantom Menace in 1999.
Obi-Wan's death was not in the final script, and George Lucas decided to kill him off during filming. Lucas said the character served no further purpose after his duel with Darth Vader, while Alec Guinness said he had begged Lucas for the death because he disliked Obi-Wan's dialogue.
Alec Guinness played Obi-Wan Kenobi in the original trilogy, and Ewan McGregor played him in the prequel trilogy and the 2022 television series. James Arnold Taylor voiced him in the animated Star Wars: The Clone Wars, and Stephen Stanton later voiced him in Star Wars Rebels.
Alec Guinness won the Saturn Award for Best Supporting Actor for playing Obi-Wan Kenobi in the original Star Wars film. He was also nominated for the Academy Award for Best Supporting Actor for the same role.
In the 2022 series, Obi-Wan Kenobi is living in hiding on Tatooine ten years after Revenge of the Sith, watching over the young Luke Skywalker. He rescues Princess Leia from the Inquisitor Reva Sevander, duels Darth Vader, and regains his connection to the Force.
George Lucas considered Peter Cushing for Obi-Wan Kenobi before deciding Cushing better suited the villain Grand Moff Tarkin. He also considered the Japanese actor Toshiro Mifune, who turned the role down because he feared Star Wars would use cheap special effects.