What is "d.gray-man"

is a 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 make 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 Hoshino's previous works and drafts, such as Zone.

The manga began serialization in 2004 in the Weekly Shōnen Jump magazine, published by Shueisha. It made the transition from a weekly to a monthly series in November 2009, when it began serialization in Jump SQ until December 29, 2012, where the series went on an indefinite hiatus. The series began serialization again on July 17, 2015 in a spin-off magazine of Jump Square, Jump SQ.Crown. There is also a spin-off novel series titled D.Gray-man Reverse, authored by Kaya Kizaki, that explores the history of various characters. As of August 5, 2014, Viz Media has released 24 volumes in the United States. The manga has also been adapted into a 103-episode anime series that aired from October 3, 2006 to September 30, 2008 in Japan. The anime is licensed by Funimation in North America. Several related items of merchandise have also been produced. A new anime series has been announced to be aired in 2016; the series creator has confirmed that it will continue from where the original anime left off, rather than rebooting. In March 2016, a new promotional video was released that revealed the name of the upcoming anime sequel, D.Gray-Man Hallow, together with the voice cast and the release date, which began airing on July 4, 2016.

The manga series has become one of the best-sellers for Shueisha, with over 20 million copies sold. Both in Japan and in North America several individual volumes have been featured in weekly top ten lists of best-selling manga. Although most reviewers deemed it similar to other series from the same genre, they praised its moments of originality and its well-developed characters and their personalities.