Lord of Bones

Rattleshirt is a character in Game of Thrones. He is played by Edward Dogliani and debuts in the second season.

Rattleshirt is a wildling warrior leader of some renown. He is noted for his shirt made of bones, which he wears to intimidate his enemies. The noise made by the shirt when he moves gives him his nickname. His real name is not known.

In the books
In the Song of Ice and Fire novels, Rattleshirt is one of a number of formerly fiercely independent wildling warrior leaders who has been recruited by Mance Rayder, the King-beyond-the-Wall, to join his forces. He is a fierce enemy of the Night's Watch.