The Vigilant, a Chiss Nightdragon man-of-war measuring one kilometer in length, was under the command of Admiral Ar'alani from the Chiss Ascendancy.
During 18 BBY, the Vigilant participated in Senior Captain Thrawn's last stand.
Admiral Ar'alani held the position of commanding officer aboard the Vigilant. Serving as its first officer was Senior Captain Kiwu'tro'owmis. The ship's complement also consisted of: