The Anime Lad
In a fantastical nineteenth century, Allen Walker joins the Black Order, an organization of Exorcists fighting weapons called Akuma. His left arm carries Innocence, the power used against them, while his cursed eye perceives what others cannot. The uniform is severe, the headquarters is stranger, and his first days offer limited orientation.
Super Eyepatch Fox
Young exorcist Allen Walker arrives at the Black Order carrying two unusual tools. A left arm empowered by Innocence, and a cursed eye that can recognize Akuma. These weapons are built from human grief by the Millennium Earl. Allen enters a Gothic war where identifying the monster can be as painful as fighting it.
Gigguku
D.Gray-man's Akuma are such a cruel idea. The Millennium Earl takes grief and turns it into machinery, while Allen's cursed eye forces him to see the human pain inside. His massive left arm carries anti-Akuma force into the Gothic action. He looks built for battle, but his compassion is the part that makes him dangerous.
Father's Basement
The opening stretch can feel episodic, with haunted towns and obvious villains queued for exorcism. Its central imagery has more bite. Akuma are mechanical weapons born from bereavement, and Allen can see what that process traps inside them. Joining the Black Order gives him allies and orders, but it does not make his cursed perception easier to carry.