"Xenocrates"'s past is unknown, as she works in relative secrecy. She always wears a veil that covers all of her features. She first appeared operating theifts on minor banks and groups in 165. She did not begin to appear with her gang of Black Knights until a robbery several months later. One robbery was operated on the Grand Exchange to find a mysterious article, but her plan was foiled by Stan Charles who locked her within the vaults.