Cosette

Cosette was a young woman living in 19th century Paris who dreamed of becoming a opera singer. Vocal coach Monsieur 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. When the Doctor and Amy went to see her at the opera, but as they left her ex-boyfriend Louis chases after her and as she leaves asking her what is wrong. When the Doctor, Amy and Louis break into Monsieur Valdemar's they find girls lined up in cabenets across the room. When they find Cosette they open the cabenet but are caught by Monsieur Valdemar. (DWM: The Screams of Death)