Maria

A girl with a distinct resemblance to Jo who, like Jo, was artificially created. She expresses a desire to hurt Jo, and so attempts to take Meg for her own. She's discovered to be Jo's "sister" and when both fight their energies are capable of entering a pocket of alternate space and reality. After Jo defeated her, she lost the drive to fight and regains her humanity to save Jo and Meg from RAPT forces. She was killed in heavy gunfire from RAPT Cybots. (Source: Wikipedia)