Based on the descriptions in Chapter 16, what are the essential characteristics and qualities of a Sadguru like Sainath?

Chapter 16 of the Sai Satcharitra portrays the Sadguru as a being of immense spiritual stature and compassion. He is hailed as the "King of Yogis," the "Imperishable" (Avyaya), and the one "beyond attributes" (Gunatita), who has taken a physical body solely for the purpose of uplifting the poor and lowly. The chapter describes him as an ocean of Truth, Consciousness, and Bliss. He possesses a sharp sword of Knowledge that makes the tree of worldly existence tremble. Importantly, he dons a "cloak of ignorance" to impart knowledge to the ignorant without transgressing boundaries. As the text confirms, the Sadguru is the ultimate refuge and a giver more generous than anyone in the three worlds, providing the path to union with Brahman through humble service.