Sally would likely be very intrigued. She loves Percy so much and would be eager to explore more of his world through fanfiction. She might be a bit taken aback by some of the more extreme storylines. Poseidon, well, he might see fanfiction as a sort of strange mortal pastime at first. But if he found stories that really delved into his relationship with Percy in new ways, he could become quite interested.
Sally would approach the fanfiction books with a mother's heart. She would look for the good in Percy's character and be proud of his heroic deeds in the fan - made stories. However, she would also be concerned about any harm that might come to him. Poseidon, as a god, has a different perspective. He might initially scoff at the fanfiction, but if he realized how much the mortal fans loved and were invested in Percy's story, he might start to take it more seriously. He could also be a bit miffed if his godly powers or his actions towards Percy were distorted in the fanfiction.
She might be shocked at some of the wild ideas in the fanfiction. Maybe she'd laugh at some of the more outlandish plot twists.
He'd probably be shocked. Percy is used to living his own story, not reading someone else's take on it.
The characters' reactions would vary widely. Annabeth would likely be critical of any fanfiction that got the details of her character or her knowledge wrong. She's very intelligent and detail - oriented, so inaccuracies would bother her. On the other hand, if a fanfiction captured her essence well, she might secretly enjoy it. Leo would probably be excited to see all the creative ideas people had in fanfiction, especially if there were cool new inventions or adventures in them.
The idea of Percy Jackson's parents reading the fanfiction books is really cool. Sally would probably love to read about all the adventures her son has that she might not be fully aware of in the official books. She could get a better understanding of the Percy's demigod world and the friends he has made. Poseidon, he might be used to being a powerful figure in the official lore, but in fanfiction, he could be presented in ways he never expected. He might have to adjust to seeing himself in different scenarios, like interacting with other gods in new ways or having different reactions to Percy's actions. It would be a whole new perspective for both of them.
In a fanfiction, the Avengers' reactions to Percy Jackson's powers would be complex. Natasha Romanoff would immediately start thinking about how to use Percy's powers to their advantage in a mission. Bruce Banner, as the Hulk, might be a bit envious that Percy has such a natural and controlled power, while his own transformation is more of a chaotic force. Steve Rogers would be in awe of Percy's connection to an ancient power source, the Greek gods. And Clint Barton would probably make some jokes about Percy being like a human water hose, but deep down he'd be impressed. Tony Stark would want to incorporate Percy's power - controlling abilities into some new technology, or at least try to understand the science behind it.
Percy would feel a deep sense of guilt as well. He might think that he should have been there to protect her. So, he would be determined not only to free her but also to make sure whoever is responsible pays for what they've done. He would use his powers over water to his advantage, like creating distractions or using water to weaken the enemy's defenses while he tries to reach Annabeth.
Percy would probably be very confused at first. He's used to dealing with threats from the world of Greek mythology, not superheroes like the Avengers. But once he realizes he's been kidnapped, he'd likely be angry. He'd try to find a way to escape using his powers, like controlling water to create distractions or even using it to overpower his captors.
His first reaction might be shock. Dragons aren't exactly common in his world, even with all the mythical creatures. But then his hero instincts would kick in. He could try to befriend the dragon, thinking it could be an ally in future battles against the Titans or other enemies. He might offer it some food, like a fish or something, to gain its trust.
Well, his friends' reactions would be quite diverse. Annabeth might see it as an interesting new development. She could be a bit protective, making sure that Percy, as a girl, isn't taken advantage of. Grover would likely be his goofy self, but also offer his support. He might make some silly jokes at first to lighten the mood. Other friends at Camp Half - Blood would also have different reactions. Some might be curious, some might be a bit hesitant, but overall, they'd probably accept Percy in this new form because they know it's still Percy deep down, with the same brave heart.
Percy's reaction would be a mix of confusion and fascination. The world of Kratos is so foreign to him, with different rules and a much darker tone. However, he would also be drawn to the hero's journey that Kratos undertakes in the fanfiction, comparing it to his own journey as a demigod.