Brutasha

Brutasha is the het ship between Bruce Banner and Natasha Romanoff from the Marvel Cinematic Universe fandom.

The Avengers
Nick Fury sent Natasha to Kolkata, India in order to recruit Bruce to search for the Tesseract. Bruce agreed despite not trusting her, or S.H.I.E.L.D. in general. On the S.H.I.E.L.D. helicarrier, after Loki's brainwashed men caused an explosion in the lab that sent Natasha and Bruce flying through a window, Bruce began to transform into the Hulk. Natasha, whose leg was pinned under fallen debris, attempted to keep him calm, but Bruce still transformed. Natasha managed to free herself and fled in terror from the Hulk. Hulk hit her across a room, and likely would have done more damage if Thor hadn't intervened and gained the Hulk's attention. Despite Natasha being visibly shaken and terrified by the Hulk, the two fought alongside each other during the Battle of New York. At the end they went to their ways with a peaceful goodbye.

Avengers: Age of Ultron
Since the days of The Avengers, Natasha and Bruce had devised a way to calm the Hulk down enough to turn back into Bruce. The method, called a lullaby, involved Natasha saying, "the sun's getting real low," and then gently touching his arm and hand. Natasha is the only one who manages to calm down hulk.

Natasha and the Hulk fought alongside each other to retrieve Loki's scepter from a HYDRA research facility in Sokovia. Though she was still visibly scared of him, she successfully used a lullaby to calm the Hulk down after the battle. On the Quinjet back to Avengers Tower, Natasha tried to convince Bruce that he wasn't a monster, that Clint would be dead without him, and that he was actually saving lives with his strength

At the after-party to celebrate their acquisition of the scepter, Natasha flirted with him, saying they should run with it, though Bruce was hesitant to start flirting with her. She protected him during the ensuing fight with Ultron's bots, telling him not to turn into the Hulk. Wanda Maximoff later inflicted them both with nightmare visions. Natasha was forced to relive her traumatic past, while Bruce was turned into a furious, unthinking, unfeeling Hulk.

After the events of Johannesburg, Clint takes the avengers to seek refuge at his farmhouse. Later on we see Bruce and Natasha talking in one of the guest rooms. Bruce expresses his intentions of leaving the Avengers, to what Natasha suggests they should run away together. Bruce declines the idea, stating that he's is dangerous and that he can't offer Natasha a proper, normal future since he can't control the hulk and have biological children, Natasha confesses to him that she's sterile as well, result of a procedure she was forced into when she was trained in the red room. The realization of both of them being 'forced' to do stuff they don't necessarily want to (for Bruce turning into the Hulk in times of losing control over emotions/adrenalin, for Natasha being part of the red room, the ceremony) but still taking guilt on themselves made Bruce reconsider running ("So we just disappear ?").

Later, when Natasha was captured by Ultron, Bruce rescued her while the others evacuated civilians from the city. Bruce told her that he was willing to run away with her. Natasha, who knew they had to finish the mission so civilians won't get hurt, kissed him, and then pushed him off a ledge to turn him into the Hulk. The two fought in the Battle of Sokovia. Afterwards, Natasha attempted a lullaby, but gunfire from Ultron prevented her from completing it. The Hulk placed Natasha safely on the S.H.I.E.L.D. helicarrier and took over a Quinjet, flying off to parts unknown. He shut down Natasha's message asking him to come back, greatly saddening her.

Thor Ragnarok
The Hulk followed Thor into the Quinjet, trying to making him stay but failed as Thor accidently turned on Natasha's old message. seeing and hearing Natasha again brought up the feelings toward her and Hulk turned back to Bruce, after 2 years of Hulk being in control. one of the first things Bruce asks Thor about is how Natasha is doing.

Avengers: Infinity War
Natasha and Bruce met for the first time in several years at the New Avengers Facility and greeted each other nicely. They later fought together in the battle against Thanos' forces in Wakanda. They both survived Thanos' snap to kill half the universe.

Avengers: Endgame
Natasha, Scott, and Steve meet Bruce at the diner

Avengers: Age Of Ultron

 * Laura asked Clint how long Romanoff and Banner had been seeing one another, though he denied it.

Captain America: Civil War

 * Rhodey, turns to Natasha, after they have seen Hulk on the Screen.
 * Tony, asked Natasha if she has any news from Hulk.

Thor: Ragnarok

 * When the Hulk saw Natasha in her message on the Quinjet, he was shaken enough to transform back into Bruce.
 * Thor tells Bruce that Natasha is alright.

Avengers: Infinity War

 * Natasha checks up on Bruce doing with the Hulkbuster.

Avengers: Endgame

 * Natasha tells Bruce that nobody blame him for losing to Thanos.
 * Bruce asks Clint where Natasha is.
 * Bruce fells on his knee learning that Natasha has died.
 * Bruce realising that Natasha was dead, Bruce fell to his knees and pounded the time machine with his fist.
 * Bruce mourns Natasha Romanoff's death.
 * Bruce suddenly vented his anger by throwing a piece of furniture across the lake. Proclaiming that Natasha could not return, Bruce charged the team with making her sacrifice worthwhile.
 * Bruce tells Steve he tried to bring Natasha back.

Quotes
"Fact is he's not like anybody I've ever known. All my friends are fighters — and here comes this guy. Spends his life avoiding the fight because he knows he'll win."

- Natasha to Bruce, Avengers: Age of Ultron.

"Hey, big guy. Sun's getting real low."

- Natasha's lullaby, Avengers: Age of Ultron.

"She's not the most open person in the world. But with you she seems very relaxed."

- Steve to Bruce, Avengers: Age of Ultron.

Fanon
On AO3, Brutasha is the fifth most written relationship for Natahsa and the second most written for Bruce.

Several headcanon so as: Natasha and Bruce love drinking tea together, having a kid names Rebecca, Bruce seeing Natasha in the soul world after snapping his fingers, etc. are very popular in fanon,

Fandom
FAN FICTION
 * Bruce/Natasha (Avengers movies) tag on FanFiction.net
 * Bruce/Natasha (Marvel comics) tag on FanFiction.net
 * Hulk/Black Widow (Avengers comics) tag on FanFiction.net
 * Hulk/Black Widow (Avengers cartoon) tag on FanFiction.net
 * Hulk/Black Widow (Avengers cartoon) tag on FanFiction.net

TUMBLR
 * tumblr@westannatasharomanoff/
 * tumblr@billiebanner/
 * tumblr@westannatasharomanoff/
 * tumblr@billiebanner/
 * tumblr@westannatasharomanoff/
 * tumblr@billiebanner/

Instagram
instagram@placefordreamers/

WIKIS