Doktor Gerde Ernst was a Nazi with psychic abilities who worked alongside Sturmbahnfurher Krabke during 1942 in a secret hideout in California.
She had tracked down and murdered Dr. Freuhoffer, stole his Elixir and Nazi Puppets so that she could use them for her own bidding. She used her thoughts to speak to the puppets and sent them on a mission to bomb a power station and then kidnapped a French psychic and forced her to track down Dr. Ivanov and André Toulon's puppets . She had mentioned knowing Ivan in the past when she helped capture his wife and she also talks about living many lifetimes which could mean she was inhuman. She had tried to replicate Freuhoffer's experiments but failed as she did not have access to his notes as they were destroyed at the Chinatown Facility explosion.
She was involved heavily with the occult and could understand Egyptian hieroglyphics and wanted to steal the Scroll of Osiris from Ivan so that she could translate it and make more elixir. When she traced Ivan's location down she was attacked by Pinhead but was saved by Oberheller Friede Steitze. Afterwards she had kidnapped Pinhead and Ivan's daughter and left a note for him to hand over himself and the scroll in exchange for their freedom. She would later take over as the leader of the Nazi operation after she proved that her powers were more skillful than Krabke's by making him kneel down and lick her shoes. She was killed after she betrayed the Nazi puppets and was attacked by them. Ivan then finished her off by using his psychic powers to destroy her soul.