Her parents died leaving her a young orphan. Esther grew up without her natural parents. Alone in the world except for the kindness of her older cousin. God gives relatives to us for our benefit. You are related to someone so that you can help them to find heaven.
Stars shine at night.
The darker the night the brighter the stars. Esther lived in a wicked heathen land but her light was brilliant. Notice the timing of her birth and physical maturity. She became a young woman in 478 BC, at just the right time to be used in God's master plan. Only God knew of the impending extermination of His people.