T.J. carries a bayonet made of bone-steel as his main weapon. T.J. is the first of Magnus' floormates to befriend him. He is very energetic and likes to capture hills, which he originally did as a private of the 54th Massachusetts. His backstory and cause of death were revealed in The Ship of the Dead: he was challenged by a Confederate whom he killed at the cost of attracting other Confederates to ambush him, though the act encouraged T.J.'s mates to participate in the successful Second Battle of Fort Wagner. Due to Britain's decision not to support the Confederates, he is very grateful to English people and constantly thanks everyone he meets in York. X – A half-troll and one of Sam's more controversial choices. His skin is grey and covered with warts and welts. He is called X as his real name is unpronounceable although Magnus describes that it is very long and the letter K repeatedly appears in it. He died in Chicago breaking up a dog fighting ring. At the end of The Sword of Summer, it is revealed that X is actually Odin in disguise. Valkyries The Valkyries are Odin's handmaidens who choose which slain Heroes should be brought to Hotel Valhalla. They also work as waitresses during feasts and provide room service to its inhabitants. Gunilla – A daughter of Thor, a member of the Thanes, and the leader of the Valkyries. She is spiteful towards Sam, because Sam is a daughter of Loki. She once dated a son of Loki who turned out to be a spy of his father. When Magnus escapes Valhalla, Gunilla leads the expedition to capture him, even after he and his friends release her from the giants' imprisonment. She later sacrifices herself while fighting Surt while Magnus re-imprisons Fenris Wolf. She carries a bandoleer of ball-peen hammers. Margaret and Irene – Gunilla's two valkyrie aides. Magnus does not find out their names until they have been killed by the fire giants at the end of the first book. Other Norse beings Norse humanoids Draugr – Draugr are Norse zombies, usually those of Vikings. They are also called Wights. Gellir – A prince of the Danes who was buried with his twelve guardians, the Berserkers in a barrow in Cape Cod. He and his berserkers always vote before they decide on something, a practice known as the Thing. His sword,