Alexandra was an normal teenager until a terrible accident in the laboratory of her father made her muscle mass and height start growing. Also, her skin become impenetrable. Initially she saw herself as a freak, but then started to use her powerful indestructible muscles to do good.
(Actually this is an account for a character in Second Life. Artists who likes the visual or history of Lady Rock, feel free to create art or stories to her. My only restriction is the explicit sex)