Storm: Ororo Munroe's parents died when a plane crashed into their home, and Ororo became a street thief in order to get by. Upon reaching puberty, she discovered her mutant power to control the weather, and she was later recruited to the X-Men by Charles Xavier.
Jill Valentine: To save her partner Chris, Jill threw herself off a cliff along with the villainous Albert Wesker. Presumed dead, she survived the fall and was taken by Wesker to be one of his experiments. She has since been outfitted with a mind control device, making her into Wesker's puppet soldier.