Your Complete Guide to the Mythical Creatures of Game of Thrones

Wights are reanimated corpses used by White Walkers to do their bidding. They can be either human or animal — White Walkers are particularly fond of horse wights — and do not decay once they have been created. Usually recently deceased, wights have very little in the way of intelligence, and only do as the White Walkers command. Much like their creators, wights have milky blue eyes.

Since they are already dead, wights are impossible to injure, and very difficult to kill. They can only be destroyed by fire, which is why the Free Folk burn corpses so they do not resurrect as wights. It is unknown whether wights are actually sentient.