Shinigami in Japanese folklore are considered gods or spirits of death who act as a psychopomp, guiding souls to the afterlife. In various narratives, Shinigami can influence the moral dilemmas faced by characters by offering perspectives on life, death, and morality. They may serve as a reminder of mortality, consequences of one's actions, or prompt characters to reflect on their choices. Ultimately, Shinigami can act as catalysts for character development and moral introspection in stories.