Miranda Leevald, otherwise known as Stacy X, had the mutant ability to exude pheromones, which she could control to stimulate bodily sensations and functions, such as causing orgasms or vomiting. Her mutation also had a physical manifestation: at the age of sixteen Stacy's skin was replaced by patterned, snake-like scales. At one point her skin was shown shedding, much like a real snake's.