The Mask appeared in one of the last issues penned by Charles Moulton and published during Moulton's lifetime. The appearance of the Mask—a tormented woman who developed a split personality which caused havoc by trapping people in fatally rigged masks that resemble S/M tools—draws on themes of psychology and bondage that recurred throughout Moulton's writings.
The Mask was a bold villainess who trapped her prey in rigged trick masks which would release deadly hydrocyanic gas into her victims' mouths unless the masks were unlatched with a special key. Wonder Woman was drawn into the emotionally intense battles between millionaire industrialist and amateur trekker Brutus Close, his frail and tormented wife Nina, and his associate Fancy Framer one day when she was flying back from Paradise Island and came across a plane in distress. Wonder Woman rescued the woman piloting the plane and landed in her invisible plane's hidden hangar, an abandoned barn in the Northern Virginia outskirts of Washington, D.C. The woman pilot fled, but Wonder Woman investigated the plane wreckage and discovered a purse belonging to Nina Close. In her guise as Lt. Diana Prince, Wonder Woman delivered the purse to the Close residence, where she immediately realized the frail Nina Close could not possibly be the pilot. While there, she witnessed an argument between Brutus Close and Fancy Framer, bold outdoor adventurer hired to lead Close's expeditions. When Close accused Framer of stealing and crashing one of his planes, Framer left and angrily threatened to expose him as a fraud to the press he so extensively courted. Diana was called back to the Close residence with word that the Mask had struck. A woman calling herself the Mask has invaded the Close residence and trapped Brutus Close in a fatally rigged mask, demanding $1 million in exchange for his freedom fromthe mask. Her ransom note insisted that he deliver the funds to the top of the Empire State Building. When military intelligence officers Maj. Steve Trevor and Lt. Diana Prince accompanied Close from Washington to New York to deliver the ransom, they were shocked to see a woman fly by in Wonder Woman's invisible plane and lasso Close and the ransom money. The Mask demanded more money from Close and similarly captured the Holliday College girls, demanding money from military intelligence. Because her invisible plane had been stolen and used to capture Brutus Close, Wonder Woman deduced that the Mask had to be Fancy Framer, who she assumed to be the pilot of the distressed plane and thus knew the location of the invisible plane. She was shocked to realize that the Mask was really Close's wife Nina, a frail and tormented mouse of a woman who had developed a split personality during her marriage to the domineering Brutus Close. The Mask reappeared in the Silver Age when a magical duplicate of her and several other opponents of the Justice League of America was used in an elaborate plot by the Demons Three to trick the JLA and free themselves. Close herself was still institutionalized at the time.
The Mask has recently reappeared in Wonder Woman Annual #1 as a masked gunwielding villain. Narrative captions describe her as "The Mask, an abused wife who murdered her husband and now uses his fortune to empower similarly victimized wives and mothers." Other DC Villains Called the Mask In Action Comics #2, Zatara the Magician faced a villain called the Mask who was working with Zatara's long-time foe the Tigress. His real name was not given and he has not appeared since. In Whiz Comics #2, Spy Smasher also dealt with a criminal called the Mask. They locked horns twice before he also faded from view, and his real name has likewise remained unrevealed. Adventure Comics #123 had Green Arrow and Speedy fighting a villain called the Mask. No real name given, only one appearance. Wow Comics #7 introduced a foe called the Mask for Mr. Scarlet and Pinky who only appeared once and had no real name given. In Adventure Comics #141, an evildoer called the Mask fought Johnny Quick. Just one appearance, no real name given. In Blue Beetle #4, Ted Kord fought a villain called the Mask who also made just one appearance and had no real name given to him. In Doll Man #5, a man named Abraham Miller called himself the Mask and did battle with that diminutive hero on one occasion. Beginning in Police Comics #32, Plastic Man had two run-ins with Samuel Runn, also called the Mask. Finally, in Adventure Comics #68, a villain called the Mask fought Hourman, with only one appearance and no real name given.