Black Widow could be a great pairing. She's a master of manipulation and Loki is the God of Mischief. They could have a battle of wits in a fanfiction. Maybe she's sent to infiltrate Loki's plans and they end up in a situation where they have to work together against a common enemy while still not fully trusting each other.
Thor is an obvious choice. Their complex brotherly relationship offers a lot of material for fanfiction. They can have intense emotional scenes, from arguments to reconciliations. For example, in a story where Loki is on the verge of doing something really bad, Thor's attempts to stop him can be very engaging.
Doctor Strange could also be a good character to pair with Loki. With Strange's knowledge of the mystic arts and Loki's own magical abilities, there could be some really interesting interactions. They could either be rivals, each thinking their magic is superior, or they could team up to solve a magical crisis that threatens the entire world in a fanfiction.
Thor is an obvious choice. As his brother, their relationship can be explored in new ways when Loki is a child. Thor can be protective and also try to guide Loki. Another great character to pair with child Loki is Captain America. Steve Rogers' sense of justice and leadership can have a positive impact on Loki. He can teach Loki about values and how to be a hero. And then there's Wanda. Her powers and her own complex past can make for an interesting connection with Loki. She can understand his struggle with his identity to some extent.
One character that would be really interesting to pair with deaged Loki is Doctor Strange. Strange could be the one to help Loki figure out how to reverse the deaging process or use his new situation to his advantage. Also, if we consider the Avengers, Natasha Romanoff could be paired with deaged Loki. She could teach him some skills that he might not have learned in his original upbringing, like stealth and espionage. And Steve Rogers could also be a good match. Rogers' sense of honor and justice could have an impact on deaged Loki and maybe even inspire him to be a better person.
Black Widow is a great character to pair with Hawkeye in fanfiction. Their history together in the comics and movies makes for an interesting dynamic. They can have a lot of action - packed scenes and also some emotional moments as they understand each other well. Another good pairing could be with Thor. Imagine Hawkeye's arrows and Thor's lightning working together in combat. It would be an epic combination.
Definitely Captain America. Their old - fashioned values and combat prowess make for an interesting dynamic. They can lead the team together in a fanfiction, with Wolverine's wild side balanced by Cap's discipline.
Iron Man would be a great pair. Their different scientific minds could lead to some interesting banter and they could collaborate on some super - advanced tech projects. For example, they could build a new type of energy shield together.
Definitely Tony Stark. He has the brains and the resources. He and Little Bruce can collaborate on new inventions or ways to control the Hulk. Plus, their dynamic in the movies was really engaging. Natasha Romanoff is another excellent choice. She has a mysterious allure, and she can be a big sister - like figure to Little Bruce. She can protect him and at the same time encourage him to be more assertive. Thor could also be a good pairing. Thor's god - like strength and his own journey of self - control can be something that Little Bruce can learn from, and they can have some really fun adventures together.
Iron Man and Cloak could be a great pair. Iron Man's high - tech genius combined with Cloak's ability to teleport and move in the shadows would create some really cool action scenes. They could also have an interesting dynamic with Iron Man's cocky attitude and Cloak's more mysterious nature.
Thor would be an interesting character to pair with Wolverine. Thor's god - like powers and Wolverine's tenacity would make for some epic battles. They could also have some great conversations about honor and sacrifice, coming from their very different backgrounds.
One character that could work well with an angry Loki is Doctor Strange. Strange is used to dealing with powerful and unpredictable entities. He could either try to manipulate Loki's anger for his own purposes or try to help Loki come to terms with it. And of course, Sif. She has a history with Loki and her loyalty to Asgard could put her at odds with an angry Loki.
Captain America is another good option. Steve Rogers' sense of justice and leadership could influence Spider - Man in a positive way. And the contrast between the old - fashioned Cap and the young, modern Spider - Man would create some great story dynamics.