Referred to by the papers as the “Wharf Rat”, this villain was a young woman who would rob and murder couriers carrying uncut gemstones while wearing a rat costume, complete with claws that she used to kill them. She was also adept at disguise, once hiding her identity behind the facade of an old, frightened woman.
The Triple Terror set a trap for her by having Menta pose as a courier. When the Wharf Rat attacked, the team captured and unmasked her. The real identity of the Wharf Rat was not revealed.