Mycroft Holmes

From Moriarty the Patriot. Stoic and in self-control, he guards his secrets closely. He is fiercely intelligent, but he does have a mischevious side particularly when it comes to his younger brother Sherlock. He also has a tenuous friendship with Albert Moriarty. He is the Chief of the War Office's Intelligence Branch, sworn to the Crown, and has entrusted MI6 to Moriarty. He will be hard to get close to, but his loyalty is strong once his trust is gained.