Bookman is an old man who records the hidden history of the world with his apprentice, Lavi. He comes from the Bookman clan and does not have a name, simply introducing himself as "Bookman". He refers to Allen as "The Destroyer of Time" as according to Hevlaska's prophecy and because he believes Allen is the only one who can defeat the Millennium Earl. Bookman also believes a "Bookman" does not put himself in the front line. He allies himself with the Black Order merely to be close to events that must be witnessed and recorded. His anti-akuma weapon, a myriad of acupuncture needles with which he can attack and traverse the battlefield, is called Heavenly Compass. Bookman is also skilled in acupuncture healing techniques.