In the book "Dream Chaser" by Sherrilyn Kenyon, a character named Simone is asked if she is a morning person. This implies a common notion that some people prefer the night over the day, suggesting different personality types among individuals.

Responding to the question, Xypher identifies himself as a Dream-Hunter and a demon, emphasizing that his nocturnal nature is inherent to who he is. He expresses a strong aversion to the sun, indicating that he thrives in darkness, which highlights a significant contrast between those who embrace daylight and those who find their true selves in the night.