Yoren

Yoren is a character in Game of Thrones. He is played by Francis Magee and debuts in the first season.

Yoren in a member of the Night's Watch and serves the sworn brothers as a recruiter. His job is to travel the Seven Kingdoms searching for fresh recruits, either willing ones or (more frequently) criminals seeking redemption by joining the order.

In the books
In the Song of Ice and Fire novels Yoren is a stalwart member of the Watch, not the most refined member but loyal and trustworthy. His travels frequently bring him to Winterfell and he has knowledge of and loyalty to the Starks and their backing of the Watch as a result.