About me: After the literal collapse of the great underground city, most of the drow race was left destitute, homeless, many orphaned, refugees on the surface. They began taking up jobs as servants just for a place to stay and food to eat. The sunlight rendering them blind and so they tend not to leave an employers home during the day once they take up the job.
Rinna is a young drow girl who was left with nothing upon coming to the surface (not that she had much underground either.) She knew life as a servant to the surface races would be difficult, and that the girls of her kind were seen as a bit of a novelty, so she cut her long hair and took to dressing as a boy, then took up a job in your home, serving your drinks and scrubbing your home from top to bottom. She really is quite diligent, and always does the chores shes given.