In anime series, the relationship between humans and shadows is often depicted as a metaphor for the complexities of human emotions and internal struggles. Shadows can symbolize the hidden or darker aspects of a person's psyche, serving as a representation of their innermost thoughts, desires, and fears. Through the interactions between humans and shadows in these series, viewers are often presented with a deeper exploration of themes such as identity, self-discovery, and the constant battle between light and darkness within oneself. The portrayal of this relationship in anime serves as a powerful narrative device to delve into the complexities of human nature and the intricacies of the human psyche.