William is a character in the anime and manga Black Butler. He is a tall man with short, dark-brown hair. He dresses in black formal clothes and wears glasses. William is an aloof, dignified individual who strictly observes rules and formalities and expects the same from others. He performs his duties with diligence, precision, and impartiality. He does not take kindly to those who cause trouble. He has no qualms about inflicting injuries on others. Head of the Reaper Supervision Department.