Which Jew married the king of Persia and bravely convinced him to reverse the decree calling for the destruction of her people?

The Jewish woman who married the king of Persia and bravely convinced him to reverse the decree against her people was Queen Esther. In the biblical Book of Esther, she uses her position and courage to reveal her Jewish identity to King Xerxes and pleads for the safety of her people, ultimately leading to the cancellation of the decree. Her actions are celebrated during the Jewish festival of Purim.