 Although Claire initially resents Castiel's return to her life, she comes to accept him and the Winchesters after they save her from being sold as a prostitute by a man she believed had been helping her.Seeking to help Dean find a cure for the Mark of Cain, Castiel breaks Metatron out of Heaven and removes his Grace so that the Winchesters can interrogate him.Although he fails to provide any new information, Metatron is able to lead Castiel to the library where he hid the remaining fragments of Castiel's Grace.