D.Gray-man is an ongoing Japanese manga series written and illustrated by Katsura Hoshino. The series tells the story of a boy named Allen Walker, a member of an organization of Exorcists who makes use of an ancient substance called Innocence to combat the Millennium Earl and his demonic army of akuma. Many characters and their designs were adapted from some of Katsura Hoshinos previous works and drafts, such as Zone, and Continue, and her assistants.