Nerdiness alert! As a 'Star Wars' aficionado, I have pondered this question countless times over the years. Technically speaking, Anakin Skywalker, who would later become Darth Vader, did not directly kill Padmé Amidala. Here's the thing, Padmé died of heartbreaking sadness after giving birth to their twins, Luke and Leia. Some theories indicate her life force was usurped by Palpatine in order to keep Anakin alive, who was on the brink of death. It was her utter devastation caused by Anakin's transformation to the dark side, which led to her demise. Despite not killing her physically, one could say Anakin's actions indirectly killed her spirit, robbed her of the will to live.