Little is known of Selena Snow's early history, though hints at some of her background, usually through flashbacks; commonly from the points of view of others. Selena has spent most of her life in a prosthetic body. She tends to keep her human emotions well under control, and what remains of her personal life she mostly keeps to herself. What is known is that she was involved in a near-fatal plane crash when she was only a child. As a result, she underwent full cyberization at the age of nine with the only organic part of her remaining being a portion of her brain. She also initially had trouble adapting to the use of her new body and inadvertently broke one of her favorite toys, a doll. This incident was one of the only times that Selena was shown capable of crying. Selena Snow posseses an incredibly durable prosthetic body, with enhanced strength, speed and coordination. In fact, only part of her brain and spinal cord remain composed of human tissue.