Langdyne

Langdyne is the het ship between Scott Lang and Hope van Dyne from the Marvel Cinematic Universe fandom.

Ant-Man
Following Scott's prison break, he found himself waking up in an unfamiliar place, with Hope standing in front of him. Scott questioned whether Hope had been watching him sleep the whole time, which she confirmed. Hope cited Scott's previous attempt to steal as the reason. Scott was startled when he began to notice the insects crawling all over the floor, with Hope revealing they were giant tropical bullet ants tasked to watch over Scott when she could not. Afterward, she told Scott to meet Pym downstairs and left him.

In the dining room, Hope was trying to convince Pym that Scott's participation was unnecessary for their plan. Scott joined them, with Pym expressing his assumption that Scott had met Hope, which Scott confirmed, calling her 'great'. It turned out that Hope was the one who had Scott arrested for stealing the suit. She was persistent on her doubts of Scott's ability, still wanting to wear the suit instead of him, also disappointed that Hank 'trusted' the criminal more than his own daughter. This led Scott to also doubt his own abilities, however Pym managed to make him overcome his insecurities by comparing their situations, both striving to make their daughters proud of them.

Scott began training with Hope, although Hope was unimpressed with his ability and was very vocal about it, calling him 'princess' and 'useless' due to his failures, and regarded his punches 'terrible'. Lang became covered with bruises and cuts, and Hope was aware of this. In an occasion, Scott was struggling to make the ants listen to him, this made Hope even more unhappy with his incompetence, prompting her to leave.

When Hope was about to leave in her car, Scott got in, blaming her for not locking the doors. Hope questioned Scott's seriousness about the mission and his awareness of the risk, noting he had a daughter. Scott answered that he was doing the mission for his daughter, which led Hope to tell her story with her father following her mother's death. She showed her disappointment about Pym wanting to 'shut her out'. Scott assured Hope that Pym did trust her, also explaining that the only reason he chose Scott to wear the suit instead was to not risk losing her.

The revelation softened Hope a bit. She changed the topic to Scott's daughter, admitting she did not know that he had a daughter when she got him arrested. She asked her name, which later she called pretty. She tried to encourage Scott to clear his mind when trying to move the ants, by remembering his wish to see Cassie. She gave Scott the earpiece to talk to the ants, then placed a coin on the dashboard. Scott succeeded at getting the ants pick up the coin and then spin it, which she complimented.

Scott managed to retrieve the Signal Decoy, but this action was being witnessed by an Avenger, Sam. Hope reassured Scott that he did good and to not mind Pym's remarking his action as irresponsible and dangerous. To carry out the plan that had complicated even more, Scott brought three of his friends, Luis, Dave, and Kurt to Pym's residence. When they fell asleep, Scott tried to thank Hope, which she cut off by mentioning that their actions were intended for a very big purpose. She added that she was glad that Scott 'might have a slight chance' of 'maybe pulling this off'. Scott proceeded to thank her for her talk on the car, and Hope responded by admitting that she had gone from despising him to 'almost liking him'. When Scott encouraged her to write poetry, Hope laughed, suggested him to sleep, and left. They later executed the plan to steal the Yellowjacket.

Following the victory over Cross, Pym revealed that he had been teleported into the Quantum Realm, however he did not remember anything. Though Pym was very eager to know what had happened, he presumed that the human mind just couldn't comprehend the experience, with hopes flourishing in his heart to bring his wife back. When he got out, he found Scott and Hope kissing, asking when did the thing happen. Hope dismissed it and say that nothing was happening, but Scott teased them by saying that something was 'kind of happening'. Scott then feigned his surprise that Hope grabbed and kissed him, which made Hope look at him with disbelief as he quickly left.

Ant-Man and the Wasp
Following the events of the Civil War, Scott had not been in contact with Pym and Hope for a while, and his relationship with the latter ended as well. Scott was under house arrest, and the tech of Ant-Man belonged to Hope and Pym, so they had to be fugitives. One day, while bathing, Scott had a dream about returning to the Quantum Realm and seeing Janet, so he contacted Pym to inform him about the matter. During the night, a bug stung him, and he fell conscious. Suddenly, he was already inside a car with Hope. Hope asked about his dream, but Scott suddenly realized that he was away from his house. He attempted to leave the car, but it was revealed by Hope that his Ankle Monitor was off, and she had programmed an ant to replicate Scott's daily routine, 'nine hours in bed, five hours in front of the TV, two hours in the bathroom'. Claiming the description as inaccurate, Scott asked Hope about how she figured out about his routine, accusing her of spying on him. Hope reminded him that she and her father kept tabs on their security threats, with Scott being the biggest one they had.

Scott began to apologize about the events of Germany, explaining that the Avengers who contacted him told him it was a matter of national security and that 'Cap' needed help. Hope was critical of his usage of 'Cap', and Scott explained that it stood for Captain America, for those who were his friends, although he began to doubt his so-called friendship of his. Scott proceeded to apologize, citing that he did not think of the possibility of being caught, while Hope sharply added that he did not think about a lot of things. Scott began to ask about Pym's condition, and Hope elaborated that they were on the run, losing their house and consequently their freedom as well. Yet again Scott tried to apologize, but Hope dismissed his apology and stated that the sole reason for their reunion was their need of something in Scott's head.

Scott found out that Hope and Pym had been working on the tunnel to the Quantum Realm, while Scott, in Hope's words, 'was relaxing at home'. Hope and Pym revealed their hypothesis that Scott might had quantum entanglement with Janet, because Scott called them about his dream of Janet five minutes after the doorway to the Quantum Realm was opened. Scott began to question his certainty about the matter, and Hope asked him about all the details of his dream. Scott's details matched perfectly with Hope's memories of her mother, and this made Hope and Pym realize that Janet was indeed alive, which brought an enormous joy to them.

To gain one final piece for the tunnel, Hope had to get it from Sonny Burch. Hope rejected Burch's offer to start a business after the latter revealed his knowledge of Hope being Pym's daughter and that they were building the quantum technology. Scott and Pym watched her fighting Burch's men in the Wasp Suit and she eventually succeeded to get the portal part. Scott pointed out that the Wasp had wings and blasters, but he optimistically assumed that Pym did not have the tech available for him, the assumption which was quickly confirmed to be false by Pym. Suddenly, Ghost appeared to attack Hope, and Scott came to her rescue using Pym's prototype suit. When Scott managed to kick Ghost, he took the chance to remind Hope that she taught him the kick, and began questioning what happened to them, but Hope also reminded him that it was not the proper time to discuss that. They lost Ghost and she managed to steal the Mobile Laboratory.

Following this, they reunited with Scott's three friends in their office, but Scott was distracted by the fact that he was provided with the smallest desk there. Realizing that Hope was irritated by this, he quickly declared that they needed to find the lab immediately, blaming Hope for not being focused, which caused a look of disbelief on her face. When they tried to ask for Bill Foster's help, Scott and Foster were being sidetracked about the first growing to the giant size in Germany, and Hope was again annoyed by this, pointing out their main mission was to track down the lab and not 'comparing sizes'.

Thanks to Foster, the team got an idea to modify the diffraction units on one of their regulators. They learned that Scott did not destroy the suit, much to Hope's amazement of his ridiculousness, and they needed to obtain Scott's old suit because it was the only one with the diffractors. Scott and Hope sneaked into Cassie's school, but the regulator in Scott's suit went on several malfunctions which made him grow and shrink to random sizes. He grew until he was no longer fitting in the room, which amused Hope. Hope attempted to fix it through his belt, he returned to his normal size for a moment and it made them awkwardly face each other. However, Scott shrunk down again, causing Hope to tease him, saying if only 'Cap' could see him now, pointing at his previous usage of 'Cap'. When the height of the top shelf was barely reachable for Scott, Hope continued to tease him as a kid. She then returned to her normal size and gave him the bag, then they retrieved the suit. In the car, Pym and Hope continued making fun of him.

Quotes
"I wanted to be his partner. But he said he wants you."

- Cassie to Hope, Ant-Man and the Wasp.

"I lost someone very important to me."

- Scott about Hope, Avengers: Endgame.

Fanon
With the relationship between being established at the end of Ant-Man, the ship quickly garnered interest in the fandom. They are the main ship in the Ant-Man and the Wasp Movieverse fandom, as the name implies, though a relatively minor ship in the Marvel Cinematic Universe. Fans like to see the interaction between the two due to their conflicting relationships. Scott makes mistakes or does ridiculous things all the time, meanwhile Hope is a very snarky person who calls him out whenever she gets the chance to. Although Hope is very visibly tired of Scott's humor and recklessness, she continues to admire him nonetheless. She can be seen showing her soft side to Scott sometime. It is also interesting that Hope is most of the time more competent than Scott, but this doesn't get in the way of their relationship, as they are very comfortable with each other.

Fandom
FAN FICTION