Why is God's name not mentioned in Esther

Why is  God's name  not mentioned in Esther?

Why is God's not mentioned in Esther - especially in obvious places like this one? scholars suggest several answers to this riddle.

Some, reading between the lines, suggest the Esther's Jewish back ground

Esther showed no reluctance to be married to a pagan king and become part of his harem. Most critically, she and Mordecai (along with all the other Jews in Eshter) had chosen not to returm to Jerusalem with the first wave of Jews nearly of a century before.(The story of that return in tole in Ezra 1-6)

Those who stayed in Persia presumably cared more about their finances than about God's plans for the Jews to return to Jerusalem from exile.

Perhaps because of this, Esther is tole as a secular story, to illustrate God's care over even "secularized" Jews.

Because the story is about God's unseen involvement in the world - everything works out for the Jews in the story even though there are no open miracles. It is a message for a time where God is not openly revealed to us, to know he is still there even though we can't see him.