Alliser Thorne

Alliser Thorne is a character in Game of Thrones. He is played by Derek Halligan and will debut in the first season.

Alliser Thorne is a member of the Night's Watch. He serves as master-of-arms at Castle Black and has particular responsibility for training newly-arrived recruits. He is noted for giving new recruits demeaning nicknames.

In the books
In the Song of Ice and Fire novels, Alliser Thorne is respected for his service to House Targaryen. During the Sack of King's Landings he fought on the walls of the city against the Lannister forces. After being defeated, he took the black.