"I shall wear no crowns and win no glory. I shall live and die at my post. I am the sword in the darkness. I am the watcher on the walls. I am the shield that guards the realms of men. I pledge my life and honor to the Night's Watch, for this night and all the nights to come."
During the Battle of Castle Black, Cooper takes part in defending the Wall against Mance Rayder 's forces. He helps load the barrels onto the ramps. When Castle Black's inner gate is threatened by a giant, he accompanies Grenn, Hill, and other black brothers to defend it. They successfully kill the giant, but all of the black brothers are slain in the process. Their bodies are discovered by Jon Snow and Samwell Tarly after the battle. After the arrival of Stannis Baratheon and his forces, though not seen Cooper is among the numerous bodies of fallen black brothers burned in Castle Black's courtyard.
In the A Song of Ice and Fire novels, there is no character by this name. Of the four men that accompany Donal Noye to face Mag the Mighty, only one is mentioned by his name - Spotted Pate of Maidenpool. The names of the other three are not mentioned.