Ulf Oakbender was Gundar Hardstriker's second in command on the Wolfcloud. He participated in the war against the Temujai in The Battle for Skandia, even though he isn't mentioned in it. He was the first to recognize Will Treaty as the Halt's apprentice from the battle. Ulf warns Gundar against attacking Will when they attempt to raid Seacliff Fief in The Sorcerer in the North, claiming he saw Will unseat five Temujai in a matter of seconds. He was killed by John Buttle, a criminal given to the crew by Will to be sold as slave, in his attempt to escape their ship. Ulf was a friend of Will, who was distressed when he heard about Ulf's death.