The ancient group whose mythology features the god Loki prominently is the Norse. Loki is a complex figure known for his cunning, shape-shifting abilities, and association with mischief. He is both a helper and a hindrance to the gods, playing crucial roles in several myths, including the events leading to Ragnarok, the end of the world in Norse lore. His dual nature embodies the chaos and unpredictability found in many ancient narratives.