The Avengers' reaction would be a mix of caution and curiosity. Hawkeye might keep his arrow aimed at Harry, ready for any sudden moves. Black Widow would be using her skills to read Harry's body language and try to figure out if he's lying. The Hulk might be held back initially, but if Harry made any sudden or 'threatening' moves, things could get really hairy. Overall, they'd all be on high alert until they understood that Harry was not an enemy but a young wizard with his own set of skills and a good heart.
He would likely be defiant. Harry has always been brave, so he'd probably resist any attempts by Hydra to control or use him.
Tony would likely laugh at some of the more out - there plot ideas. He'd probably think he could come up with better technology than what's in the fanfic. Steve would be more open - minded and might enjoy the creativity. Thor would be like 'This is not like any Midgardian story I've heard!'.
Some Avengers might be amused. For instance, Tony Stark would likely find it a fun distraction from his usual high - tech world and might even make sarcastic comments about the plot or characters. He could say something like 'These wizards should really upgrade their transportation - brooms? Seriously?'.
Some of them would be entertained. Iron Man might laugh at the strange spells and potions. Hulk might not understand much but could enjoy the action parts if there are any. Thor could be curious about the magic and how it compares to his Asgardian powers.
Well, in a fanfiction scenario, if Harry Potter was captured by the Avengers, there could be a lot of confusion at first. The Avengers might think he's a new kind of threat from another dimension. Harry, on the other hand, would be really bewildered by all the high - tech gadgets around him. He'd probably try to use his magic, which would shock the Avengers. Maybe Iron Man would be the first to try and analyze his magic, while Captain America would be more cautious and try to communicate with Harry.
In such a fanfiction scenario where Harry Potter is captured by the Avengers, initially there would be a lot of confusion. The Avengers, being protectors of Earth, might see Harry's magic as something dangerous and unregulated. However, once they start to communicate, they could find common ground. Harry could show them how magic has been used for good in his world, and the Avengers could introduce Harry to the concept of superhero teamwork on a large scale. It could be a really interesting crossover story.
The Hulk, if he was in his Bruce Banner form, would be very worried. He'd use his scientific knowledge to figure out a way to counter Thanos' power. But if he was in his Hulk form, he'd just be enraged and want to smash his way to Black Widow. The other Avengers like Thor would also be determined to rescue her. Thor, with his newfound strength and his axe Stormbreaker, would be ready to face Thanos head - on to free Black Widow.
They would also be very protective. Tony Stark, for instance, would use his wealth and technology to give Harry a safe place to stay. Steve Rogers would offer his moral support and train Harry to be strong both physically and mentally. Natasha Romanoff would teach Harry self - defense skills. All of them would work together to make sure Harry never gets abused again.
Some of the Avengers would be very protective. Captain America would see Harry as a kid in need of guidance and safety, just like he does with his teammates. Tony Stark might be initially skeptical but would soon see the potential in Harry's magic. Thor would probably be fascinated by Harry's magical powers and see him as a worthy addition to their group.
The more combat - oriented Avengers like Captain America would see it as a useful tool in battle. He could strategize on how to best utilize Harry's ability. For instance, Harry could transform into his animal form to scout ahead or create distractions during a fight against a powerful enemy. Steve would appreciate this new element in their fight against evil.