The beautiful Rainbow informed Fairer-than-a-Fairy that he was young , the son of a powerful king , and that the Fairy , Lagree , who owed his parents a grudge , had revenged herself by depriving him of his natural shape for some years ; that she had imprisoned him in the palace , where he had found his confinement hard to bear for some time , but now , he owned , he no longer sighed for freedom since he had seen and learned to love Fairer-than-a-Fairy .