Guinevere Godiva
Guinevere Godiva was obsessed with magicians and objects associated with them. She was on Henry Gordon Jago's show Those Were the Days. (AUDIO: The Age of Revolution)
She later invited Jago to lunch, in order to get something of his. (AUDIO: The Case of the Gluttonous Guru)
She killed several scientists, earning her the nickname of "the Brain Drain Killer". These scientists were making a new crystal lock for the time cabinet. (AUDIO: The Bloodchild Codex)
Godiva wanted to resurrect Magnus Greel. She rebuilt Mr Sin to serve Greel, and reconstituted his mind in 1968 using the Thraskin crystal she got from Jago and Litefoot. She was killed along with Greel when Ellie Higson entered Greel's distillation chamber, using her unnaturally long lifespan to overload Greel's time cabinet. (AUDIO: The Final Act)