D.Gray-man, Vol. 1

Allen Walker is an Exorcist working for the Black Order, a secretive organization fighting the Millennium Earl and his army of Akuma — weaponized souls trapped in demonic machines. Marked by a cursed left eye that reveals Akuma for what they are and wielding an Innocence-powered arm, Allen travels a Victorian-tinged world hunting down the Earl's creations before they can spread despair and destruction.