Appearance and Character Edit
Hallis is muscular. He has a square, brown beard. He has a habit of stating the obvious.
A Game of Thrones Edit
Hallis is tasked with finding the origin of the Catspaw. He discovers that the man had been seen around the castle in the weeks leading up to the event. He is then present when Catelyn Stark announces her suspicion that Bran Stark was thrown from the First Keep by Ser Jaime Lannister. Robb initially considers sending Hallis south with his mother, but Catelyn decides to take Ser Rodrik Cassel instead.
When Robb rallies his men to compare, Hallis follows Robb to the south and is Catelyn's bodyguard at the Battle of the Whispering Wood.
A Clash of Kings Edit
When Robb sends his mother Catelyn to form an alliance with Renly Baratheon, Hallis Mollen accompanies her to Bitterbridge and later on Storm's End.
After Renly dies, Hallis and Catelyn go back to Riverrun, and Ned's bones are delivered. Catelyn tasks Hallis Mollen to bring Ned's bones to Winterfell and bury them in the crypts.
It is unknown what happened to Hallis Mollen and the bones of Ned, but they have never arrived at Winterfell.