Clone Abigail is the Professor's first cloned creation (as the others had already been developed by the Martians). The Professor designed Clone Abby to mimic the original Abigail in appearance and weapon preference, but removed the personality traits that the Professor believed "limited" the her. As such, Clone Abby is cold and calculating, making the most out of any situation given to her, but her robotic personality means that she has trouble adjusting to areas "outside" of her programming.