Darth Vader

On Mustafar, Darth Vader turned against his former master, Kenobi, and his wife, Amidala, when the two refused to join him. He caused Padme's death by choking her which lead to her death in child birth. At that same time he dueled his former master Kenobi. Ultimately, Kenobi emerged the victor, and he was left limbless and burnt on the banks of a volcanic river. Forced to live in a life-supporting armored suit afterwards, he continued to serve Sidious as his apprentice and chief enforcer, putting down rebellions with his master and Grand Moff Wilhuff Tarkin. He also trained the Inquisitorius to hunt down any remaining Jedi and retrieve any newborn Force-sensitives per his master's will.

Almost two decades after his turn to the dark side, the various rebel groups who opposed the Empire's tyranny had united to form the Alliance to Restore the Republic, and destroyed the Death Star, the super weapon meant to cement the Emperor's rule over the galaxy. As the sole survivor of the Empire's greatest defeat, Vader was blamed and found himself pitted against several potential replacements vying to become the Emperor's new apprentice. In the meantime, he uncovered that the Force-sensitive pilot who destroyed the Death Star was his son, Luke, whom Amidala had given birth to before she passed away and Obi-Wan had hidden on the one planet he would never return to, Tatooine.