The Demons clan are a race of humanoid beings who were at odds with the Goddess race 3,000 years ago until Meliodas' actions caused his people to wage war against the Goddesses and Stigma, an alliance of the Human, Giant, Fairy races. The demons were sealed away, only to be released into Britannia through the machinations of the demon Fraudrin. The high-ranking Demons possess seven hearts, making them difficult to kill.