Aircraftman Second Class Shetland is a pied gerbil. Despite his lowly rank, he often manages to be on the scene at crucial moments. He is always eager to help out and takes on many duties outside his immediate remit, e.g. fetching tea and coffee.
British by birth, Shetland has a keen sense of social class and is easily intimidated by personalities like Brittany Harker.
Shetland was named after Sheltie (RIP), a fat and vicious gerbil belonging to Huskyteer.