Loki would likely use his vampire - enhanced abilities to his advantage when interacting with the Avengers. He could be more stealthy and use his hypnotic powers on some of the members. For example, he might try to turn them against each other.
Loki would interact with the Avengers in a very manipulative way. Since he is a vampire, he has an air of mystery and danger. He could play mind games with the Avengers, especially with those who are more susceptible to his charm. At the same time, he might be drawn to some of the Avengers' powers and try to use them for his own gain in the vampire - themed story.
In fanfiction, Loki's interaction with the Avengers would be complex. He has a history of being an enemy, but also has moments of reluctant alliance. Sylvie, being a variant of Loki, would bring her own perspective. She might view the Avengers as symbols of the power structures she wants to undermine. Loki could be caught in between, trying to balance his new relationship with Sylvie and his past with the Avengers. The Avengers would be on guard, not fully trusting either of them.
The Avengers' interaction with Loki's kids in fanfiction would be complex. Thor, being Loki's brother, might have a more nuanced view. He could try to guide the kids towards the right path. Iron Man, on the other hand, would likely use his technology to keep an eye on them. And the female Avengers like Scarlet Witch might try to empathize with the kids if they seem lost or confused. There would be a mix of suspicion, hope, and attempts at understanding in these interactions.
In this fanfiction, Loki might interact most with Hulk. It would be an interesting dynamic as Loki is a master of manipulation and Hulk is, well, the Hulk. Loki could either try to use Hulk for his own purposes, which would be very dangerous, or he could end up on the wrong side of Hulk's anger. But at the same time, it could also lead to some unexpected moments of understanding or at least a begrudging respect between them.
He would probably interact a lot with Thor. Since they are brothers, there is a pre - existing relationship full of complexity. Also, he might interact with Iron Man quite often. Tony Stark's sarcastic nature and Loki's trickery could lead to some really interesting exchanges, either in the form of verbal sparring or working together on some high - tech and magic - combined projects.
Future Loki might interact with the Avengers in a cautious way. He knows their past opinions of him and tries to prove himself. He could start by sharing small bits of useful information. For example, he might tell Iron Man about a weakness in a new enemy's technology.
If we consider the Hulk, he would be a very intimidating presence to the vampires. But the vampires, especially someone like Klaus Mikaelson, wouldn't be easily intimidated. Klaus might see the Hulk as a worthy opponent or a potential tool in his power - hungry schemes. On the other hand, Natasha Romanoff could bond with Caroline Forbes over their strong female personalities. They could share fighting techniques and strategies. And Thor would be quite fascinated by the different supernatural elements in Mystic Falls, seeing it as another realm of mystery similar to Asgard.
Well, Loki's magic is based on Asgardian sorcery, which is very different from the vampire's powers that are more biological in nature. However, they could still interact. The vampire's immortality might be of great interest to Loki, and he could study it using his magic. On the other hand, the vampire could use its power of rapid healing in conjunction with Loki's magic. For instance, if Loki is injured during a battle, the vampire could heal him faster by sharing its blood, and Loki could then use his magic to boost both of their defenses against their enemies.
Well, Thor might be a bit shocked at first. He'd probably be amused by some of the wilder interpretations of his brother in the fanfiction. Captain America, on the other hand, would likely be confused by the whole concept as it's so different from the traditional stories he's used to. Iron Man would probably make sarcastic comments about how creative the fans are in coming up with these stories.
Snape would probably start off being rather aloof. He'd observe the Avengers' behavior and abilities before making any real moves to interact. He could be sarcastic towards them, especially if they make assumptions about him or his magic. But as time goes on, he might start to see their value and open up a bit more, sharing some of his magical knowledge.
Naruto would interact in a very enthusiastic way. He'd be in awe of the Avengers' powers and would want to learn from them. At the same time, he'd show off his own ninja abilities. He might bond with Hulk over their shared 'rage' - like Naruto has his nine - tailed fox anger and Hulk has his own. He'd also try to cheer up the more serious Avengers like Black Widow with his positive attitude. And he'd probably try to get them all to do some ninja training together.