Who is the Agnihotri from Nashik mentioned toward the end of Chapter 12, and why is his arrival in Shirdi significant?

Towards its conclusion, Chapter 12 introduces a story about a ritualistic and orthodox Agnihotri (a keeper of the sacred fire) from Nashik, whose surname is Mule. His arrival is presented as a highly significant event, illustrative of the Guru's greatness. The chapter explains that his visit was not a mere coincidence but occurred due to the "strength of his past merits." It emphasizes this point by stating that without such merit, "no one can stay in Shirdi for even a moment." His story is set up as a delightful tale that happened by a "stroke of good fortune" to demonstrate how destiny brings devotees to their Guru, even if their initial intentions are different.