Based on the provided text, describe the nature of Mhalasapati's relationship with Sai Baba.

Mhalasapati shared an extremely close and intimate bond with Maharaj, characterized by selfless and consistent service. As described in Chapter 0, on the nights Maharaj slept in the Masjid, Mhalasapati would sit by his side until dawn. These long vigils were filled with "very affectionate conversations" between them. This routine continued without fail for years, until Mhalasapati's passing. The text also notes that Mhalasapati was highly advanced spiritually and completely selfless, serving as a source of guidance, joy, and a "place of rest" for other devotees, especially after Maharaj.