"Esther had not revealed her nationality and family background, because Mordecai had forbidden her to do so. Every day he walked back and forth near the courtyard of the harem to find out how Esther was and what was happening to her." NIV translation
Esther had not revealed her Jewish identity because Mordecai told her not to. Mordecai is not in the will of God and we can see it by his lack of peace. He spent every day pacing at the gate but, if it was of God, he would have peace. If we know that something is God's will for us, we can be confident and rest in the fact that He is in control.
"Before a girl's turn came to go in to King Xerxes, she had to complete twelve months of beauty treatments prescribed for the women, six months with oil of myrrh and six months with perfumes and cosmetics." NIV translation
We are reminded that the girls had a year to prepare for their chance with the king.
"And this is how she would go to the king: Anything she wanted was given to her to take with her from the harem to the king's palace. In the evening she would go there and in the morning return to another part of the harem to the care of Shaashgaz, the king's eunuch who was in charge of the concubines. She would not return to the king unless he was pleased with her and summoned her by name." NIV translation
Now, my friends, that brings into focus the fact that this is not God's will.
We know, from Genesis 2:24, that God created a man and a woman to be one (not a bunch of women to be one with a man).
The losers from the encounter with the king became concubines (women that were just used for the pleasure of the king).
"When the turn came for Esther (the girl Mordecai had adopted, the daughter of his uncle Abihail) to go to the king, she asked for nothing other than what Hegai, the king's eunuch who was in charge of the harem, suggested. And Esther won the favor of everyone who saw her." NIV translation
God can and will show favor to His people in various ways. Even though God was probably not happy with this whole contest, He blessed Esther by causing the people around her to like her. The same can be true for us today in that, when we are walking with Jesus, people will see a difference and want to be a part of Him.