After having lived for a thousand years, Beatrice was summoned by Kinzo Ushiromiya. She forged a contract with him and provided him with ten tons of gold. For the duration of their contract, Beatrice was to remain in the human realm and was effectively Kinzo's prisoner. As a result, Beatrice was bound to the body of Beatrice Castiglioni and was imprisoned on Rokkenjima. In order to escape, Beatrice allowed herself to die during childbirth which in turn allowed her to leave her human vessel.