Astall was a 24th century female Starfleet officer. Lieutenant Astall, a Huanni, was assigned to the USS Voyager as Ship's Counselor under the command of Captain Chakotay in 2378. Chakotay believed that Astall was assigned to him as a favor granted by Admiral Kathryn Janeway. Her skin was pale purple, her hair a deeper shade of that color, and ears that resembled a kangaroo's. Like all of her people, one could tell the emotions she was feeling by her ear position. Later in 2378, Astall took an extended leave of absence, and was permanently replaced on Voyager by Hugh Cambridge.