Sangaire is a malevolent spirit of resurrection capable of animating nearby objects, most typically suits of armor. He appears as a red humanoid and had resided in the Brotherhood’s (fighter’s guild) armory.
Sangaire had some kind of connection with the spirit that possessed Haadija so that when she bit Azhar’s leg it created a parasitic relationship between Azhar and Sangaire. Sangaire was leeching off of Azhar’s life force to sustain a physical appearance of itself on the mortal plane. Because of this Azhar died when Sangaire was slain/banished.