TK-9091 was the designation given to a male human who held the rank of Stormtrooper Commander. He was a member of Vader's Fist, the personal stormtrooper legion of Darth Vader. During the secret mission to Tatooine, TK-9091 communicated to Vader that the Death Star schematics were absent from the primary computer of the Tantive IV. Consequently, he and a group of troopers were dispatched to locate Princess Leia Organa within the vessel. While inspecting the escape pod bay, TK-9091 noticed her concealed within an alcove and instructed his squad to switch their firearms to stun mode. Subsequently, the princess discharged her Defender sporting blaster at him, resulting in his immediate death.
TK-9091 is a character featured in Star Wars: Episode IV A New Hope, released in 1977, which marked the beginning of the Star Wars original trilogy. His identity was subsequently revealed in "The Bucket," a short story included in the 2017 anthology titled From a Certain Point of View.
In the 2016 graphic novel, Star Wars: The Original Trilogy – A Graphic Novel, TK-9091's encounter with Leia Organa on the Tantive IV has a different outcome. Organa fires a stun blast, but TK-9091 avoids it, and it strikes another stormtrooper. Following this, TK-9091 successfully stuns Organa.