Gertrude "Gert" Case was the aunt of Sheila Case, who was killed by the Sailor's Ghost, after she saw the Ghost Ship. She was killed as she was involved in a car accident that killed her cousin, Brian.
Gert was first contacted by Bela who used the alias "Alex". Gert helped her, and the Winchesters, gain entry to the Pine Seas Maritime Museum where the Hand of Glory was kept, not realizing Bela's true intent.
Gert was very attracted to Sam and even hit on him in the party at Pine Seas Maritime Museum.