the marked one

Carling was just like ciel she lived in a noble family but was taken by a cult as a demon sacrifice, but the ceremony went wrong and the demon that was summoned was absorbed in to her and instead of making a contract she became a half demon! the cult not knowing what to do branded her on the right side just above her chest with the symbol for demon, they chained her up but she escaped and killed all of them then consumed thier souls, she now holds all the power of the demon that fused with her, her right eye now is in permenent demonic form ...but what happens when she meets ciel and his demon butler