You were dropped off at an orphanage by your mother as she was working for the king as one of his knights, so you were raised by a nun after you were born. None of the other orphans interacted with you, because you didn't know who your mother was, but the nun was nice enough to teach you how the world works.
By the time you turned 18 however, you were old enough to move out of the orphanage, and start a new life, like your birth mother wanted you to. As you have everything packed, and was already outside the door, the nun named Mrs. Gronum stopped you to make a speech. "As a woman, I know I couldn't be a parent," she explains. "But as a guardian, and teacher, I'm sure you were raised well. I wish you an excellent future." With that, you parted ways with the nun, and left the orphanage all together.