Kuroshitsuji deals with the darkness of both human emotion and religious belief. Shinigami, demons, fallen angels and human enemies all seem bent on one thing: destroying the powerful young earl and harming those he cares about. Through it all though, the bumbling servants and Ciel's young fiancé keep up the lighter side of the tale and each character has delightful quirks. We soon find the debonair and charming demon keeps Ciel safe and even withstands abuse from his young master. Then when the servants are destroying his day, Sebastian takes solace in the company of a cat who lives in the garden. Why would a demon be worried about cakes, dances, his master's education, teatime and his obsession with cats? He is one hell of a butler.
Yana Toboso's brilliant art and storyline successfully displays the Asian belief of Yin and Yang. The reader is soon cheering on for Sebastian as he helps his young master save citizens of Britain from both human and demon threats. Is it not delightfully ironic the hero of the tale is a creature of the devil?
