Quent is a recurring character in the second season. He is played by guest star Aidan Crowe and debuts in "The Old Gods and the New." He is a guard serving House Stark in the War of the Five Kings.
He is warmly greeted by King Robb Stark as he tours the camp. He is present when Ser Jaime Lannister is recaptured and returned to the camp.
In the books
In the A Song of Ice and Fire novels, Quent is a House Stark guardsman. He accompanies Bran and Robb to the Wolfswood during Bran's first ride since being crippled. After the outbreak of the War of the Five Kings, Quent marches south with the rest of the Northern force, and fights under the command of Hallis Mollen, the Winterfell captain of the guards after Jory Cassel's departure. Quent is one of guardsmen ordered to accompany Ned Stark's remains to Winterfell after they are returned to Robb Stark as a gesture of good will by Tyrion Lannister.