Created by Jim Lee and Brandon Choi, illustrated by J. Scott Campbell.
Fairchild is the daughter of Alex Fairchild of Team 7. The identity of her mother is unknown and Caitlin has never mentioned her. When he was forced to go underground to escape International Operations, Alex Fairchild left Caitlin in the care of relatives in Portland, Oregon. Raised by her aunt and uncle alongside her cousin Karen, Caitlin grew into a brilliant, but rather mousy young woman.
Caitlin was affected by her gen-factor causing her mass to increase and her muscle density to grow exponentially. This gives her incredible strength and durability as well as increased stamina and agility.