Black Widow is a Marvel superhero.
Black Widow ( Чёрная вдова , transliterated Chyornaya Vdova ) ( Natalia Alianovna `` Natasha '' Romanova , Russian : Наталья Альяновна '' Наташа '' Романова , also known as Natasha Romanoff ) is a fictional superhero appearing in American comic books published by Marvel Comics . The character was first introduced as a Russian spy , an antagonist of the superhero Iron Man .