In Norse creation stories, the first being is Ymir, a primordial giant whose body is used to create the world. His death leads to the emergence of the earth, seas, and the first humans, Ask and Embla, emphasizing the themes of sacrifice and transformation. Ymir's role illustrates the interconnectedness of life, as the cosmos arises from his existence. The narrative also reinforces the idea that creation can emerge from destruction, capturing the Norse belief in cyclical renewal and the dual nature of chaos and order.