Allen Walker is the protagonist of the anime series D.Gray-man. He is an Exorcist and a member of the Black Order, an organization tasked with defeating the Millennium Earl and his army of Akuma. Allen is known for his kind heart, strong sense of justice, and determination to protect humanity. He wields the Innocence weapon, which allows him to combat Akuma and their dark forces. Throughout the series, Allen grapples with his mysterious past and the evolving power within his cursed left eye, which can see the souls trapped in Akuma.