Arabella wasn't just a princess, nore was Isabelle. These two princesses were also undercover spys. They saw to that the royal ball had no ambushes and so on...
Arabella and Isabelle were invited to PRINCE Kaspers ball! (this is so amazing because they never got invited to balls, but thier own) They were so happy they even went shopping for a new ball gown. They were so EXCITED since this was the first time since they joined the royal gard spy agency that they could relax.
They had the most beautiful dresses ever and as soon as they were done buying the dresses they packed to leave and went a month early to the ball!
On the way there, they rememberd that they had left thier spy kit at home in SunSweet Vally. But by then it was too late for them to turn back because they had been riding for two days all ready. So they left it behind.On the third day they had one hour left to ride and then they would be there, but then all of a sudden they got ambushed. Arabella and Isabelle were so upset that they took their dresses instead of their spy kit to the ball but they thought 'waist not want not' and so they took their dresses and ran...
The next day they made it to the castle and their dresses were all recked. With them looking so recked and ashambed, they didn't want to show themselves to prince Kasper, so they disapeard into the woods and were never seen again.
There are some rumors though that prince Kasper went out to look for them and all he found was thier recked dresses. And since that day no one visits the castle of Erendor....