When Leona Dorsey was diagnosed with an incurable disease, she sought the help of a geneticist who specializes in cures for radical diseases to reverse the disease He used the genetic code of an animal. Believing that Catwoman was a real cat, he withdrew his DNA for use in Dorsey, but found that she was a "mere human". Being held prisoner, Catwoman saw the doctor using the genetic code of a leopard to change the physiology of Dorsey to cure it, who instead turned into a leopard humanoid. With an animalistic character, she killed the doctor and his assistant and almost killed Catwoman if she had not deceived her and ran away.