What kind of person is introduced at the end of Chapter 12, and why is his story significant?

Towards the end of Chapter 12 in the Sai Satcharitra, we are introduced to a man named Mule, who is described as a 'ritualistic, orthodox Agnihotri' from the holy city of Nashik. An Agnihotri is a keeper of the sacred fire. The chapter explains that he came to Shirdi due to the strength of his past merits, as no one can stay there without such a spiritual account. His story is presented as highly significant because it is a 'very delightful story' that serves to illustrate the greatness of the Guru and is indicative of the love a Guru has for his devotees. The text hints that although his initial intention for coming was different, a strange coincidence led him to the rare meeting with Sai Baba.