Crystal was the second child born to the Inhuman nutritionists Quelin andAmbur. Her father Quelin was the brother of Rynda, wife of Agon, king of theInhumans, and as such she was considered part of the Royal Family of Attilan. Like her older sister Medusa, Crystal was subjected to the Terrigen Mist when she was an infant, and the process endowed her with certain mental powers.

Inhuman Metabolism: Besides strength, Crystal possesses certain physical skills superior to those of human athletes. Her Inhuman metabolism affords her slightly greater reaction time, endurance, and speed than the human race's most perfect physical specimen, Captain America.