The Executive Officer. Never referred to as anything but "Number One," this officer is female. Almost mysteriously female, in fact -- slim and dark in a Nile Valley way, age uncertain, one of those women who will always look the same between years twenty and fifty. An extraordinarily efficient space officer, "Number One" enjoys playing it expressionless, cool -- is probably Robert April's superior in detailed knowledge of the equipment, departments, and personnel aboard the vessel. When Captain April leaves the craft, "Number One" moves up to Acting Commander.