Natasha Romanoff
One of the greatest spies and assassins in the world, and a founding member of the Avengers.
Where is he from?
Black Widow debuted as a Marvel villain in Tales of Suspense #52 in 1964. She was among the huge list of possible new Avengers, many of whom were villains, to be named in Avengers # 16 in 1965, but didn't become an actual member of the team until issue #32 a year later. In the Marvel Cinematic Universe she's played by Scarlett Johansson, and is finally getting her own movie in 2020, even after the character (spoilers) died in 2019's Avengers: Endgame.
Comic Appearances
GND 193 - Sarah breaks from studying with Christine & a Goblin to meet her Uncle Phil at a cafe, near Ramona Flowers & Lauren. Phil mentions Natasha & Barton before he has to run.