This chapter seems to be setting up a story. Can you tell me about the character being introduced and the premise of his story?

Certainly. Chapter 12 introduces an upcoming story that is described as delightful and illustrative of a Guru's greatness. The central figure of this story is a ritualistic, orthodox Agnihotri, which is a keeper of the sacred fire, from the holy city of Nashik. His surname is 'Mule'. According to chunk 4, he arrived in Shirdi due to the strength of his past merits, as the text claims no one can stay in Shirdi for even a moment without such merit. It is hinted that his original intention for the visit was different from the outcome, which resulted in a rare and beneficial meeting with Sai Baba.