In Esther 4:14, Mordecai suggests that Esther may have been placed in her royal position for the purpose of saving her people, similar to how Joseph in Genesis 45:5-8 recognizes that God sent him to Egypt to preserve life.
Esther 4:16 shows Esther's resolve to risk her life for her people, paralleling the faith and courage of Shadrach, Meshach, and Abednego in Daniel 3:16-18, who were willing to face death rather than worship other gods.
Esther 4:3 describes the Jews mourning, fasting, and weeping in response to the decree against them, similar to the call for repentance and fasting in Joel 2:12-13 as a response to impending judgment.
Esther 4:11 highlights the risk of approaching the king uninvited, similar to Nehemiah's cautious approach to King Artaxerxes in Nehemiah 2:1-5, where he also risks his life to make a request.