WARNING: Spoilers for Obi-Wan Kenobi season 1.
By having Reva, the Third Sister, give up on her revenge and survive the events of Obi-Wan Kenobi, Star Wars avoided one of the franchise’s oldest tropes. While Obi-Wan Kenobi featured villains whose fate audiences already knew, such as the Grand Inquisitor and the Fifth Brother, the show also added a new Inquisitor in the Star Wars canon, Reva. As such, the Third Sister's story in Obi-Wan Kenobi was one of the few elements on which the show could build some sense of stakes, which was paid off in Obi-Wan Kenobi’s episodes 5 and 6.
Initially, the Third Sister seemed to be after Obi-Wan Kenobi - one of the most powerful Jedi who could still be alive after Order 66 — only to impress Darth Vader and become Grand Inquisitor. However, Reva’s scenes in Obi-Wan Kenobi also suggested that there was more to the Third Sister’s plan than just to impress Darth Vader and the Empire. It was later revealed that Reva’s true goal was to kill Darth Vader, as she was one of the younglings who were at the Jedi Temple on the night it was stormed by a fallen Anakin Skywalker. However, even after getting close enough to Vader, Reva did not stand a chance against the villain.
Related: Kenobi's Leia Ending Makes Obi-Wan's Death Even More Tragic
Reva’s second alternative to avenge the younglings was to try to kill Luke Skywalker. However, the Third Sister saw herself and all the other younglings in Luke, which led to her breaking moment. The Obi-Wan Kenobi finale saw Reva regretting her decision to give up on the dark side, and the character was now ready to move on from all the hate and vengeance that had guided her for so long. The decision of not only redeeming the Third Sister but also allowing
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