Ciel Nanaya is a main character from the visual novel and anime series Tsukihime. She is a calm, intelligent, and skilled member of the Burial Agency, an organization that hunts supernatural threats. Ciel is assigned to investigate and eliminate the vampire menace in Misaki City. She becomes closely involved with the protagonist, Shiki Tohno, serving both as an ally and sometimes adversary. Known for her love of curry and her dual nature of kindness and ruthlessness, Ciel is a complex character pivotal to the story’s progression.