Hallis Mollen

Hallis Mollen is the new captain of the guards at Winterfell after the departure of Jory Cassel.

Season 1
Ser Rodrik Cassel suggests to Catelyn Stark that if she is heading south to capture Tyrion Lannister, she should take "Hal" and a squad of guardsmen with her. Catelyn turns him down, pointing out that too large of a traveling party will attract unwanted attention. Instead, Catelyn only allows Rodrik himself to accompany her.

In the books
In the A Song of Ice and Fire novels, Hallis Mollen is Jory Cassel's replacement as captain of the guards at Winterfell. He has a tendency to state the obvious.

In the books, Hallis goes south with Robb Stark's army and takes part in the Battle of the Whispering Wood. Hallis actually accompanies Catelyn south when she goes to treat with Renly Baratheon at Storm's End. After Catelyn receives Eddard Stark's bones (at Riverrun), she orders Hallis to escort them back to Winterfell for proper burial in the crypts. This was before the Fall of Winterfell occurred, but Hallis (and Ned Stark's remains) have not been mentioned in the next three novels. In the TV series, Ned Stark's bones are not delivered to Riverrun; instead Littlefinger hears that Catelyn Stark is traveling to Renly Baratheon's relatively nearby camp at Storm's End, so he takes them with him (the TV series condensed this into one trip). No mention is made of what happened to Ned Stark's bones as Catelyn fled the camp after Renly's death with only Brienne of Tarth, but Hallis may have been given the bones off-screen (or the Silent Sisters would later convey them to Riverrun, and then send off Hallis with them).