Zagras is right-hand to the Kalastria bloodchief Drana. Her word is his bidding, and his loyalty is unquestioning. He has devoted himself to scouring the Skyclaves in search of the means to create new bloodchiefs. This is the source of his loyalty — Drana has promised Zagras that should he find the secret of creation, he will be the first to receive its gifts.
His abilities as a rogue are not to be underestimated. He navigates the dangerous hallways of the Skyclaves with ease. Many adventurer parties have woken in the morning to discover their own rogue missing and a nearby Zagras ready to offer his condolences — and his services.