Double is a sadistic and violent Maverick, being a genuine sociopath who just can't feel remorse for his victims. However, he can fake a earnest personality REALLY well (able to fool most people around him in his disguise), making him perfect as Sigma's double agent. Double's body is made of a fluid metal that allows him to change his shape alongside his two different personalities: a short, chubby Reploid and a tall, malicious Maverick, said form wielding fearsome agility and pink beam knives.