Lucilla Fredericks

 was a pupil at St Cecilia's School for Girls. She informed George Litefoot about his predecessor. She had a note that excused her from games. When Henry Gordon Jago took the kids to the New Regency Theatre, she didn't accompany them due to her medical condition. She was in fact a Vampire. She told Jago about The Old One. (AUDIO: School of Blood)