Imagine a soulmate AU in which your OTP gets a step-counter. For each step they take, the number on the counter goes down, marking the moment they meet their soulmate.
Perhaps as children, they run around often, just to see the numbers go down.
Maybe Person A and B are on track team or go jogging, and while they are running, they do not notice the numbers rapidly dropping. Then they crash into each other, disregarding the fact that their counter has a large 0 on it.
By chance, Person A can be stepping up to Person B with a weapon in hand, when suddenly, the steps hit 0.
Imagine Person A and Person B sit next to each other in school every day in a certain class, but never talk. One day, Person A glances at Person B’s notebook and realizes that Person B is an artist they follow on social media and immediately start gushing about how much they love their work.
Imagine Loki meeting and bonding with Clint’s kids while he’s at the Avengers’ Tower, serving his sentence by helping rebuild New York. They are being kept their to keep them safe from threats. All their meetings happen after midnight, when the kids can’t sleep, and seek him out. Talking to him calms them down and helps them sleep. It becomes an almost daily ritual, with no one the wiser, as he always returns the kids to their room once they’re sound asleep. They affectionately call him Uncle Loks, having no idea about his and Clint’s history. Loki likes their company, because they don’t judge him and aren’t afraid of him, being unaware of his misdeeds. They are the only ones in the tower who like his company and talk to him, and he bestows them with the knowledge about the nine realms and delights them his magical illusions. He grows very fond of them and they of him. In a way, being with them has a healing effect towards his torn and tormented soul. He pretends that they’re his family and it gives him peace, since he feels that both his birth and adoptive families abandoned him.
One day, the Tower is attacked and Loki actively protects the kids and their mother, instead of seeing it as an opportunity to escape. When Clint is told about it, and Loki’s bond with his kids revealed, he becomes absolutely livid. The rest of the Avengers aren’t comfortable with this development either, and hence, Loki is sent back to Asgard, where he is dumped in the dungeons for the additional charge of manipulating innocent children. He is alone and isolated once again, and his newly gained inner peace shatters, driving him near insanity. He is often seen interacting with illusions of the kids and is deemed mad.
Meanwhile, the kids insist that Loki did nothing to harm them, and try to convince everyone to bring him back. This prompts Tony to seek Jarvis’s secret audio from Loki’s room. It reveals the truth about Loki’s loving relationship with the kids, much to everyone’s surprise. Everyone but Clint votes to bring Loki back, not yet realizing that it might just be too late to bring him back from the brink of madness.