The Traveling Clergyman

The Traveling Clergyman,  is the first chapter in the first volume of the D.Gray-man: Reverse novels. This chapter focuses on Allen Walker as he tries to make his way to the Exorcist HQ. As he can't find its exact location, he visits a woman simply called Mother in hopes of being guided by her as she was one of his master's patron. The Mother, however, agrees to help him if he helps a certain girl in town who has recently lost her loved one.

Trivia
This story was later adapted into episodes 29 and 30 of the D.Gray-man anime.