#42 suffers with a multiple personality disorder. Gregory is his other personality. Gregory is quite mean, uncivil, decidedly straight, calculative, dull-witted but fully aware of his athletic prowess, obsessed with #13, and hates #42 and #23. At one stage during the course of the story, someone forcably cuts #42's hair without him being able to see this change, and when he next looked in a mirror he didn't recognise himself and his mind fractured again in the instant. Something of an identity crisis.