Liulfr, commonly known as Fur, is the pet dire wolf of Kaisa Blackwell. He was born in the Tronin Desert and guarded the entrance to Xibalba, the lair of the Sirithai. He attacked the Grand Alliance who tried to infiltrate the lair but later joined them when Kaisa tamed and befriended him. Liulfr has been Kaisa's pet and guardian ever since, following her wherever she goes.