In Norse mythology, Halla is often associated with the concept of the underworld or the realm of the dead. She is sometimes depicted as a goddess or a spirit who guides souls to their final resting place. Halla's role emphasizes the importance of the afterlife in Norse beliefs, where the journey of the soul is significant. Halla is also linked to the cycle of life and death, reflecting the natural order of existence. Her presence in myths highlights the connection between the living and the dead, illustrating how the two realms interact in Norse cosmology.