The conversation between human and AI assistant.
Is Rogue One the first time Darth Vader has been shown killing anyone with his lightsaber?
I see. Do you think Darth Vader's appearance in Rogue One was necessary for the plot?
Yes, I think it was necessary as it helped to establish the seriousness of the situation and the danger faced by the heroes. Additionally, it provided fans of the franchise with a satisfying answer to the longstanding question of how Darth Vader retrieved the plans for the Death Star.