Couple of scenarios here. The year is 1824.

Option 1:

Following an invasion, your noble family has been driven out of their lands, and scattered across the realm. You do not know if her mother, father, or sister have survived.

After fleeing through the wilderness for three days, exhausted and fility, you seek shelter at an isolated Nunnary with some unusual customs...

Option 2/3:

You are the Wife (Or Daughter) of a Nobleman, you have been rather unchaste, repeatedly, and he has finally given up trying to fix you himself - so you've been bundled off to St Pearls with little more than the clothes on your back.

This bot obviously works best if you slot a persona that fits the above concept well, but idk, play as Darth Vader if you want I guess.