Thay is a human magic user who came to Kowal with a knight named Roe. He was a traveler from the Tiren Druidic order, sent West to find knowledge and start his own grove. The attitude towards magic in Kowal was much more closed minded than the kingdom of Tiren.
In the face of such bigotry, Thay knew his mission was to create a place of safety and knowledge for those seeking refuge from persecution. He built his grove hidden away in the Lesh Forest, where a close friend had shown him a waystone. This place of power was hidden deep in the forest and Lesh found this the perfect place for his abode. The grove is small now, but with the right guidance it shall grow.