Lots of interesting creatures and curses are used to guard and control the safety of fairies lands and outside the realm. Jealousy, greed, and power grabbing are common. But the rules need to be followed. That can be a real challenge to those who do not fit in. Or get kicked out.
But love can conquer if you have faith and are rewarded for saving the queen. And her authority. Just be brave and always willing to help those in trouble or in need.