Natasha Romanoff

Natasha Romanoff, better known as Black Widow, is a character from the Avengers fandom.

Character
Natasha is one of the best spies and assassins in the world. Originally an agent of the Soviet agency for foreign intelligence, the KGB; she later became a member of S.H.I.E.L.D., the international counter-intelligence agency. Having extensive mastery in the martial arts and armed with her Widow's Bite, Black Widow was one of S.H.I.E.L.D.'s most talented agents. When Loki declared war on Earth, Black Widow joined the Avengers and helped to defend New York City.

After the Avengers defeated Loki, she continued her work with S.H.I.E.L.D., this time working with fellow agent Captain America. After the HYDRA Uprising, which resulted in all of her morally dubious history being revealed to the world, she dropped off the grid to begin rebuilding her cover. She later rejoined the Avengers, working to bring down various HYDRA cells across the world and the rogue artificial intelligence Ultron. Unlike most members of the original Avengers, Black Widow remained a member of the second incarnation of the team after the Ultron Offensive.

After the governments of the world demanded the Avengers to sign the Sokovia Accords, she agreed to their terms. However, She later joined Iron Man in a fight against Captain America because his disagreements with the Accords and his criminal activities with the Winter Soldier. As the two Avengers's factions fight each other, she betrayed Iron Man's team in order to assist Captain America to find the instigator of the teammates' fight. As result, Black Widow had to escape once again from the government for aiding her old friend.

Het

 * Black Frost - the ship between Natasha and Loki
 * Black Patch - the ship between Natasha and Nick Fury
 * Black Thunder - the ship between Natasha and Thor Odinson
 * Black Tie - the ship between Natasha and Phil Coulson
 * Brutasha — the ship between Natasha and Bruce Banner
 * Clintasha — the ship between Clint Barton and Natasha
 * Iron Widow — the ship between Tony Stark and Natasha
 * NatPanther - the ship between T'Challa and Natasha
 * Romanogers - the ship between Steve Rogers and Natasha
 * Samtasha - the ship between Sam Wilson and Natasha
 * Winter Widow - the ship between Bucky Barnes and Natasha

Femslash

 * Agent Widow - the ship between Peggy Carter and Natasha
 * Black Hill - the ship between Maria Hill and Natasha
 * Black Pepper — the ship between Pepper Potts and Natasha
 * Bobbinat - the ship between Bobbi Morse and Natasha
 * Nakoye - the ship between Natasha and Okoye
 * Natsharon - the ship between Sharon Carter and Natasha
 * Romaynov - the ship between Melinda May and Natasha
 * Scarletwidow - the ship between Wanda Maximoff and Natasha
 * WidowShock - the ship between Darcy Lewis and Natasha
 * Yelenat — the ship between Yelena Belova and Natasha

Poly

 * Black Pepperony - the ship between Natasha Pepper Potts and Tony Stark
 * WinterWidowHawk - the ship between Bucky Barnes, Natasha, and Clint Barton
 * Black Bowtie - the ship between Natasha, Clint Barton and Phil Coulson
 * WinterIronWidow - the ship between Bucky Barnes, Tony Stark and Natasha

Family

 * Domestic Avengers - the ship between all the Avengers

Canon
Bruce Banner

Clint Barton

Bucky Barnes

Fandom
AO3