Esture was a Lieutenant of the Human species (a male), and he found himself serving his duty aboard the Death Star.
During the events of 0 BBY, Esture was working on the first Death Star when he went to inspect the droid known as P-RC3, who was experiencing some memory malfunctions amidst the Battle of Yavin. He then contacted Atour Riten, who was the librarian on the Death Star and also the droid's owner. However, Riten was in the middle of trying to desert his post, and tricked Esture into thinking he had accidentally called flight control instead, by answering in that manner.
Subsequently, he perished when the Rebels successfully attacked the Death Star, triggering a massive explosion that resulted in the death of all personnel present.