Cordelia Hallowell is a ghost residing at the Thorn family crypt on Croatoa. Alexandra Quick refers to Cordelia as her and Julia King's "cousin," though how closely they are related is unknown. During the Summer of 2010, Diana Grimm used a Banishing Spell on Cordelia during a skirmish with Abraham Thorn at the crypt. Cordelia's relation to Patience or Augusta Hallowell is currently unknown, though her presence at the crypt would seem to imply that she is possibly a maternal aunt of Abraham's.