Natasha Romanoff would be an interesting character to include. She's very perceptive and could be the one to first notice the change in Loki's behavior towards Tony. And then there's Bruce Banner. His scientific mind could interact with both Loki's magic and Tony's technology, and he could also offer some unique perspectives on their relationship, perhaps warning Tony about the risks of getting involved with Loki.
One main character could be a young scientist. This person could be intrigued by Loki's arrival and his other - worldly powers. They might try to study him in a non - invasive way, which could lead to some interesting interactions between them. Another character could be a street - smart kid who Loki befriends. The kid shows Loki the ropes of the city and in return, Loki protects the kid from the local bullies.
Well, perhaps in this fanfiction, Loki falls to earth right in the middle of a big city. He finds himself in the middle of a bustling crowd and decides to blend in. He might start exploring human culture more closely, like trying different foods at food trucks. As he does this, he accidentally gets involved with a group of people who are on the run from some bad guys. Loki then has to use his powers to protect them while also keeping his identity a secret.
In a fanfiction, Foster could be a descendant of an ancient wizarding family with a connection to the Bifrost. Harry Potter, while on one of his adventures, stumbles upon Foster. Together, they embark on a journey to the Bifrost. Along the journey, they learn about the history of their respective families and how they are intertwined with the magic of the Bifrost. They also face challenges like dark wizards who want to control the power of the Bifrost for evil purposes.
One possible plot could be Loki initially trying to use Tony for his own gain but then truly falling for him. Maybe Loki, in his usual sly way, gets close to Tony to access some of Stark's technology, but as time passes, he discovers Tony's charm, intelligence and vulnerability, and his feelings turn sincere.
Foster could be a Muggle - born who has an innate ability to sense the Bifrost. Harry Potter, being the famous wizard he is, helps Foster understand and control this new - found connection. They might use the Bifrost to travel to different magical realms and discover new spells or magical artifacts. For example, they could end up in a realm where magic is based on music and have to learn to adapt to use their magic there.
One possible fanfiction could involve Jane Foster using the Bifrost to accidentally end up in the Harry Potter universe. Maybe she arrives at Hogwarts and is mistaken for a new kind of magic user. The students and professors would be intrigued by her Asgardian technology and different kind of magic. She could potentially teach them about the Nine Realms while also learning about the wizarding world's magic.
Jane Foster could introduce Harry Potter to the concept of the Bifrost. She might show him how it works and how it can be used to travel between different realms. Harry, in turn, could share his knowledge of magic with her. They could then use their combined knowledge to go on an adventure, perhaps to a new and unknown realm.
One possible love story in Gravity Falls could involve Mabel and a local boy. Mabel is this bubbly, creative girl. She might meet a boy who shares her love for arts and crafts. They could bond over making sweaters or creating some unique art pieces inspired by the strange creatures in Gravity Falls. They start spending more and more time together, going to the town fairs, and sharing their dreams. Their love story could be about two kind - hearted souls finding each other in this weird and wonderful town.