Loki’s character evolves significantly throughout Norse mythology. Initially portrayed as a companion of the gods, he embodies mischief and trickery, often aiding them in various situations. However, as the myths progress, Loki's actions lead to increased tensions among the gods and culminate in his betrayal during Ragnarök, the end of the world. This transformation from ally to adversary highlights themes of chaos and duality, showcasing the complexities of loyalty and deception within the pantheon.