She was known as the "Bestie in Menschenhaut" ("beast in human skin") for her cruel treatment of prisoners during her tenure as a warden at Ravensbrück concentration camp, according to a 1990 edition of the East German magazine Für Dich ("For You").
In the same year, along with other female concentration guards (German: Aufseherin) she accompanied a transport of prisoners to the Genthin sub-camp where she remained until the end of the war.
In another instance, after a Polish prisoner was seriously injured by Bergmann's dog during the fall of 1945, that woman was then ordered to work despite the wound, and was given no permission to be treated.
"[5] In a different incident, prisoners working in a cellar where thousands of kilos of vegetables were reportedly spoiled by the negligence of SS men were ordered by Bergmann to stand along a fence, and then were then beaten with a dog leash.
In a separate case, a 61-year-old woman was forced to stand for nine hours in the cold, open air while Bergmann showered her with ice-cold water.