"The leader of the Ten Men, McCracken was also the most elusive (Milligan had never laid eyes on him), and Kate now had the dubious honor of meeting him before her father did. He was an opposing figure - a huge man with shoulders like bedside tables, perfectly coiffed brown hair, and piercing blue eyes - but his reputation was more imposing still. According to Milligan, McCracken was the most dangerous Ten Man of all, and now here he stood, smiling at them in the darkness."
— Kate Wetherall seeing McCracken for the first time
McCracken is the presumed leader and most powerful of the Ten Men. He has bested Milligan on several occasions and played large parts in Mr. Curtain's plans.
McCracken has access to weapons that ordinary Ten Men do not, such as Pandora.