Cosette

Cosette was a young woman living in 19th century Paris who dreamed of becoming a opera singer.

Biography
Cosette's vocal coach, Eldritch Valdemar, told her she was a failure but asked her to look into his eyes. In doing this he placed in her an alien virus which made her a fabulous singer - and screamer. The Doctor and Amy went to see her at the opera, but as they left her ex-boyfriend Louis chased after her and as she left, asking her what was wrong. When the Doctor, Amy and Louis broke into Monsieur Valdemar's house, Valdemar had Cosette sing scream them into unconsciousness.

Later, Louis held Cosette to prevent her from following Valdemar. The Doctor had her carry him in chase of her master. They went to the Notre Dame de Paris, where the Doctor rang the bell, releasing Cosette and the other victims from Valdemar's control. They then drove him over the edge of the roof, killing him. (DWM: The Screams of Death)