Who is Damu Anna, as introduced in Chapter 25, and what is his significance to the narrative?

In Chapter 25, Damu Anna is introduced as a "well-to-do person from Ahmednagar, a wealthy Kasar (bronze-smith)." He is importantly characterized as a great devotee who is devoted to Sai's feet. His significance to the narrative is that his story is presented as a prime example of Sai Baba's profound love for his followers. According to Chapter 25, Damu Anna's tale will demonstrate how Sai Baba "wards off all the misfortunes" and "grants the desired objects" for any devotee who possesses "one-pointed faith." His story is intended to fill listeners' hearts with joy and help them understand how the Guru is an "Ocean of Mercy."