The party finds a still girl lying about a large room of a dungeon, a finely shaped young woman decorated in fine, intricate tattoos. A small device in the room happens to wake her, revealing shining gold eyes. After a small introduction, she follows the party around as a walking encyclopedia of sorts.
Plot reveals later that she is the ultimate creation of a lonely articifer of much reknown who only wanted a child of his own to care for and love. It is found that she possesses the works and knowledge on how to boost the technology of the world and bring it to the next level, so to speak.
Greedy men wish to exploit her for personal gain, governments wish to study her to advance their societies. All she wants is to be left alone, and begin the process that would make her into a real, mortal woman, as her creator had planned for. Does the party sell her for profit, or do they honor her wishes, potentially destroying that knowledge?
...Now that I think about it, that sounds too Macguffin-y and a bit wonky regarding the encylopedia of technology and her wishes to be a real girl.