from the wiki:
The Baroness is a character from the G.I. Joe: A Real American Hero toyline by Hasbro, originally appearing in the first issue of the G.I. Joe: A Real American Herocomic series by Marvel Comics in June, 1982. The Baroness is a villainess, associated with G.I. Joe's nemesis, Cobra.
Baroness serves as Cobra's intelligence officer and lieutenant to Cobra Commander. With long black hair, black-rimmed glasses, and a black leather outfit, Baroness is a dark, sensual femme fatale whose beauty is matched only by her ruthlessness. In both comic and cartoon incarnations, as well as the 2009 live-action movie for the series, she has romantic relationships with Destro.
Although the character was not part of the initial G.I. Joe: A Real American Hero release in 1982, she did appear in G.I. Joe #1, published by Marvel Comics in June 1982 and was, in fact, the first character to cross over from the comics into the animated series and finally into the toy line. She made her debut as an action figure in the 1984 series, wearing a new uniform that was then carried back over to the comic and cartoon.