She sat at her spot at the long common room table, going over her Charms notes from the morning, when the portrait door swung open.  Only about half of their year was gathered in the dorm, each falling silent as an unknown woman stepped over the threshold.  She had black hair that had begun to grey, half pulled back from her face.  Dressed in a black cardigan over a blue shirt and jeans, the woman carefully eyed their group.  Her face was rounder, and her nose angular.