In Norse mythology, the god Loki plays a complex role as a trickster and a shape-shifter. He embodies chaos and mischief, often causing problems for the gods while also helping them in unexpected ways. Loki's actions can lead both to harm and to necessary change, emphasizing the duality of his character. His eventual betrayal of the gods culminates in the events of Ragnarök, showcasing themes of betrayal, consequence, and the intricate balance of order and chaos within the mythological narrative.