The door opened again, and Cyril came in, followed by a young girl of about fifteen. She wore a black traveling cloak over a green dress. Even if Tessa had not seen her before, she would have known who she was instantly - known her by her black hair, by the violet-blue of her eyes, by the graceful curve of her white throat, the delicate angles of her features, the full swoop of her mouth.
She heard Will draw a sudden, violent breath.
"Hello," said the girl, in a voice both surprisingly soft and surprisingly firm. "I apologize for interrupting your dinner hour, but I had nowhere else to go. I am Cecily Herondale, you see. I have come to be trained as a Shadowhunter.