Malthace, also known as Thacia or Thace, is Joel's sister and the leading female figure in Elizabeth Speare's novel The Bronze Bow. Thacia is portrayed as a beautiful, intelligent, intense young girl, who caters to the needs of others and correctly interprets the verse regarding what it takes to bend the bronze bow. Like her brother and Daniel, Malthace anticipates the coming of the Messiah but chooses to wait patiently for Him instead of resorting to violence against the Romans.
After initially shunning Daniel, Thacia dresses his wounds after he is injured by a Roman soldier, hides him in their home, and nurses him back to health. She also comes up with a plan for Joel to learn the names of the rich guests attending the banquet, dresses up as Joel so that he has an alibi, and carries a heavy load on her back for a mile while Roman soldiers watch her closely. Thacia is also a positive influence on Daniel's sister, Leah, and she goes out of her way to spend time with the shy, traumatized girl. In addition to her compassion and strength, Thacia also has faith in Jesus and proves to Daniel that only love can bend the bronze bow.