Dark Queen: The Cybelline Prophecies

A 21st century covert ops agent, Cybelline found herself transported to a medieval world of magic and war without a clue of how she got there.

Fine, she'll consider this as early, early retirement, ignore that she's now turned into a 12 year old, and try to have a quiet, peaceful life.

Maybe she would buy a farm and raise some ducks. She didn't plan to have royalty fall over her doorstep and demand marriage for "taking his innocence".

Granted, she tripped him first, but he deserved it.

If her idyllic life had been undisturbed, she could even ignore the war between humans, the Fae, and the Folk. If they had left her alone, perhaps she would have never discovered power so potent that it could destroy the world. Perhaps she would have never become the most feared person in the realm.