Kaori was taken under Hokuto Ryouzou's wing via adoption after the passing of her grandmother. She possessed the shamanic ability of an "uta" from Okinawa, with her left eye granting her glimpses into the future of others. At the prominent movie company, the "Hokuto Group," Kaori was an integral figure responsible for the company's success. When Hokuto Ryouzou passed away, his will revealed that a son selected by Kaori would lose their presidency and leave with her. Despite her affection for Seiya, Kaori chose to marry Youhei.