In the Bible, there are a number of heroines (Deborah, Rahab, Sarah, etc.). They do some very amazing things. We see in the Book of Esther that Esther is also a heroine. As her people faced the threat of annihilation under the king who ruled the land where they lived, Mordecai (a descendant of the first King of Israel) asked her to do something that could mean death. He wanted her to speak to the king. By her speaking to the king without being summoned, it was an act against the law.

With little hope, she said to Mordecai, "Go, gather together all the Jews that are present in Shushan, and fast ye for me, and neither eat nor drink three days, night or day: I also and my maidens will fast likewise; and so will I go in unto the king, which is not according to the law: and if I perish, I perish." (Esther 4:16).

Esther had cause to be afraid. But she made the decision to go ahead; she faced her fears. She was successful. Esther convinced the king of the plot to destroy her and her people. The king then appointed Mordecai his prime minister, and issued a decree allowing Jewish people to defend themselves. By Esther going against her fears, she activated powerful and unexpected forces that resulted in freedom and prosperity for her people.

More Info: bible.org