Allen Walker (Japanese: アレン・ウォーカー Hepburn: Aren Wōkā) is a fictional character who appears as the protagonist of the manga D.Gray-man by Katsura Hoshino. He is also the protagonist of its two anime adaptations, D.Gray-man and its sequel D.Gray-man Hallow, and has appeared in three light novels, two video games, and several crossover fighting games. In the series, set on 19th-century Earth, Allen Walker is a teenager who joins the Black Order, a group of soldiers known as Exorcists. As an Exorcist, Allen is able to use a mysterious object known as Innocence to fight demons known as Akuma. While Allen's Innocence takes the form of a giant left arm initially, over time it takes new forms and gives him new abilities. Over the course of the ongoing series, Allen uses these powers to fight the M