Star Wars Obi Wan and Anakin Skywalker

Obi-Wan Kenobi was a Jedi Master from Star Wars. During the series' prequel trilogy, he served as a mentor for Anakin Skywalker. Their relationship as Master and Padawan was rocky, but the two soon grew to see each other as brothers after Anakin became a Jedi Knight at the explosive start of the Clone Wars. They fought side-by-side throughout it.

After Anakin was later turned to the Dark side by Darth Sidious, becoming Darth Vader and killing hundreds of Jedi and younglings, Obi-Wan was heartbroken at what his former Padawan had caused. When ordered by Yoda to confront and destroy Anakin, Obi-Wan was loath to do so, but reluctantly accepted. After a perilous duel on Mustafar between former Master and apprentice, Obi-Wan defeated and dismembered Anakin, but couldn't bring himself to murder him in cold blood and remorsefully left him for dead.