Cooler is the eldest daughter of King Cold and Frieza's older sister. The boss of the "Cooler Force division" of her family Intergalactic Army, she is as cruel as the rest of her family and was the first known member of her family to discover a transformation beyond her race's true form, which now always uses as her current form. In this fifth form, her body undergoes great changes as opposed to her base form: her breasts and muscle-mass have expanded greatly. She also has a Prehensil tail.