For much of the story Daniel's never quite sure where he stands with Thacia. Sometimes, she can display incredible hostility towards him, as when she tells Daniel to his face to leave Joel alone. Joel could be a rabbi one day, she says; the last thing he needs is to fall in with a gang of thieving outlaws.
Later on, however, Thacia gets with the program and pledges herself to the cause of liberating Israel from Roman tyranny. It is she who devises the precise wording of the vow that she makes along with Daniel and Joel. Not only that, but she suggests the bronze bow, from the Song of David, as a symbol of their sacred oath. Thacia believes that this symbol is appropriate as it represents the strength that the love of God can inspire in his children. With God's love, you can do anything, even what appears to be the impossible, such as driving the Romans out of Israel.