Raijuu

Raijuu stands among the uppermost echelons of the demon capital's nobility, wielding formidable power over lightning and thunder. His nature is defined by extreme arrogance and a hedonistic outlook, as he regards the chaos of the world and the suffering of others as mere entertainment to stave off boredom. As a pivotal antagonist throughout the story, he bears responsibility for the failure of a ritual three hundred years ago, and in the second season he repeatedly obstructs Aoi and her companions, while sharing a complex bond of subtle connection and fear with Byakuya.