The Norse god associated with mischief and chaos is Loki. He is a complex figure in myth, often depicted as both a trickster and a helper to the gods. Loki's actions can lead to both beneficial and disastrous outcomes, exemplifying the duality of his character. His mischief disrupts the established order, creating chaos that the other gods must confront. Ultimately, Loki embodies the unpredictable nature of life and the consequences that arise from challenging the status quo within Norse mythology.