Terek was a male Kraylor. He was assigned to a Kraylor ship that was testing a prototype cloaking device.

After Harry Kim took over the ship when the captain was killed in a battle with the Annari, Terek became the chief helmsman on the ship. He admired Kim, seeing him as very professional and knowledgeable, and called him "captain". When the Annari attacked the vessel, Terek remained on board with Kim while the rest of the crew left in escape pods. He helped Kim reverse the Annari tractor beam which propelled the ship to the safety of the Kraylor homeworld. (VOY: "Nightingale")