Based on Chapter 30 of the Sri Sai Satcharita, how does Sai Baba relate to his devotees and what is his fundamental nature?

Chapter 30 portrays Sai Baba as the ultimate compassionate Lord, a 'Karuṇālaya' or abode of mercy, whose darshan alone can dispel a devotee's fear of worldly existence. The chapter explains a profound concept: while Sai is initially formless (Nirguni), it is the power of a devotee's devotion that draws Him into a form with attributes (Saguni). This chapter emphasizes that it is an unavoidable duty for saints like Sai to uplift their followers. He is described as the master who knows the innermost desires of His devotees' hearts and possesses the unique capability to fulfill them, thus making His followers feel complete and fulfilled.