The Ultaarian Greenback was a sentient, four-armed, bipedal species. Members of the species had green eyes, a pink horn growing from the nose, large fangs, and pink skin. During the Galactic Civil War, a member of the species faced the Human Han Solo in the Big Game, a gladiatorial combat on the space station known as the Wheel. The four-limbed warrior wielded a dagger thorn in each hand during the bout.