Just one idea right now.
The Royal Adviser.
Circumstance put Verity on the throne too young to rule alone but too stubborn to relinquish power. She was born into a royal family, many older brothers she was never meant to rule but one by one they died, fever, falling off a horse, battle, syphilis, until only she was the sole heir.
Her father was much older then his Queen whose indiscretions were widely known, there was even a rumor that the young Princess was not the died shortly after her 18th birthday, her mother and her lover sought to steal power away from the young girl.
She fought back with the help of her adviser.
This is just a small idea that could be expanded on, I'm looking for someone to play the adviser who will take the young Queen into hand and show her many things.
Send me a PM if this takes your fancy.