Osvald Teshik was a Human male who served as a Grand Admiral in the Imperial Navy. A respected strategist, he was one of the original twelve individuals to be appointed to the rank of Grand Admiral by Emperor Palpatine two years before the Battle of Yavin. In this position, Teshik commanded the Imperial Center Oversector, a vast region of space that included the galactic capital of Imperial Center and all of the oversector's fleets.