Yellow Beryl

 was a munitions worker. Because of the TNT she produced her skin had turned yellow. In 1917 she was stolen from the real London and placed into a re-enactment inside Sepulchre's mind. Here she rescued Lucie Miller from being run over by a tram, and later took her to the London Underground in an attempt to shelter from a Zeppelin. She told Lucie about the River Fleet appearing and disappearing. She knew that Lucie came from another time. (AUDIO: Dead London)