D Gray-man, Vol. 28A cursed teenage boy saves mankind one soul at a time. D. Gray man is the story of Allen Walker, who roams a fictional 19th century Earth in search of Innocence, a mysterious substance used to fight demons known as akuma. Allen Walker continues the tale of his past as an orphan child working in a circus. He was called Redarm then and knew little but misery in that life. He did, however, befriend one of the clowns, Campbell, and his dog, Allen. Another