Minnie is a villainess from In The Wake of the Werewolf, a story from Forbidden Worlds #17 (released in May 1953). She and her husband Frank owned a desolate house and rented out a bedroom to a young woman named Beatrice. During the beginning of the comic, professional thief Larry Coe had infiltrated the house and was in the midst of robbing the house when he heard a commotion caused by Minnie, Frank, and Beatrice.
As Larry attempted to flee, Beatrice rushed to him and begged for his help. Larry then saw that Minnie and Frank were respectively armed with a wooden stake and an ax, and that they were trying to kill Beatrice under the belief that she was a vampire. When Larry defended Beatrice and tried to convince Minnie and Frank that they were wrong, the evil couple refused to believe it and chased after Larry and Beatrice, deciding they would have to kill him as well. Minnie was even led to believe that Larry was also a vampire who was colluding with Beatrice.
Eventually, Beatrice and Larry were able to take refuge in her bedroom, where Beatrice revealed a secret of Minnie and Frank's: they were werewolves. Larry initially dismissed Beatrice's claim as a result of the trauma she'd been through, but saw the truth himself when he looked through the peephole, watching in horror as Minnie and Frank transformed into werewolves. Larry then turned to find that Beatrice had also transformed into a werewolf, with the comic ending under the insinuation that Larry was murdered by Beatrice.