Craig is a 12 year-old boy who has been crippled since birth. Given the age difference between him and his older sister, Jessie, he never really knew her outside her parents' frequent arguing about her. While he loves his mom, he grew up idolizing his dad, a pinnacle of strength that his broken body could never achieve. Perhaps because of this, his intellect expanded to a super-genius level.
SPARTAN-12 was cobbled together from spare parts found in boneyards, using funds "appropriated" illicitly. Standing approximately 10 feet tall, SPARTAN-12 appears to be no less than a jury-rigged heap of scrap metal roughly shaped like a man. A dome-like structure sits in place of it's head which contains two glowing photoreceptors among other sensory devices.
Craig's greatest dream is to have unlimited funds and time to explore the limits of robotics.