The Master Patterner is one of the nine masters of Roke Island.
In the novella "The Finder", which tells the tale of the founding of the School of Roke, the first Patterner was a woman named Ember.
At the time that the Earthsea Cycle concludes, in The Other Wind, the Patterner has for many years been a retired Kargish soldier named Azver.
The Master Patterner dwells in, and communes with, the Immanent Grove, a forest on Roke island embodying one of the Old Powers of the Earth.