Who is Damu Anna as introduced in Chapter 25, and what is the stated purpose of telling his story?

As detailed in Chapter 25, Damu Anna is introduced as a well-to-do, wealthy Kasar (bronze-smith) from Ahmednagar who was a devotee devoted to Sai's feet. The chapter sets the stage for his narrative, describing it as a "novel story" that is short but "very pure in its meaning." The stated purpose of sharing his story is to demonstrate Sai's love for His devotees and to show how Sai wards off the misfortunes of those who maintain one-pointed faith. The author promises that by listening to this account with reverence, the listeners' hearts will be filled with joy and their difficulties will vanish, providing a clear example of how the Guru-Mother acts as an "Ocean of Mercy."