During his early years as a Guardmouse, he was assigned to watch over the outpost of Frostic after his mentor, Celanawe, was sent away on a vital mission. At one point in his life, the mice of Willowroot presented Loukas with a magnificent sword as a reward for his bravery. He was killed by the weasels of Darkheather during the Winter War of 1149.
During the winter of 1152, Loukas' past-pupil Saxon found the bones of Loukas in the abandoned weasel dungeon tunnels of Darkheather. Saxon mourned for his former mentor and retrieved Loukas' sword and cloak-pin.