The firstborn son of the Archduke of Rosaria. Though all expected him to inherit the Phoenix's flames and awaken as its Dominant, destiny instead chose his younger brother Joshua to bear this burden. In search of a role of his own, Clive dedicated himself to mastering the blade. His practice pays off when, at just fifteen years of age, he wins the ducal tournament and is dubbed the First Shield of Rosaria—tasked to guard the Phoenix and blessed with the ability to wield a part of his fire.