The primary role of the Valkyries in Norse mythology is to choose those who may die and those who may live in battles. They serve Odin and guide fallen warriors to Valhalla, where these heroes prepare for Ragnarok. Valkyries symbolize the intersection of fate and bravery and illuminate the beliefs surrounding honor in death. Their role emphasizes the Norse warrior's path to glory and the afterlife, underlining the significance of valor in battle.