The characters in Percy Jackson would initially be confused. Percy, for example, would be trying to figure out how the wizarding magic works alongside his own demigod powers. Annabeth would be analyzing the situation from a strategic point of view, seeing how the twins could impact the safety of Camp Half - Blood. In Harry Potter, Harry would be empathetic towards the twins, as he has always been an outsider himself. Snape would be his usual skeptical self, doubting the twins' intentions. And the Weasley family would probably welcome the twins with open arms, especially Ginny, who has a sense of adventure and would be interested in their unique abilities.
In Percy Jackson, the gods themselves would have mixed reactions. Zeus might see the twins as a threat to the balance of power between the worlds. Poseidon and Athena, on the other hand, might be more intrigued and want to use the twins to their advantage. In the Harry Potter world, the students at Hogwarts would be divided. Some, like Ron, might be a bit wary, while others, like Luna, would be very open - minded. The Death Eaters would likely see the twins as something to be exploited if they thought it could help their dark cause.
For the Harry Potter characters, Ron would probably be a bit jealous of the twins' cool powers at first. But as he gets to know them, he would become friends. Snape would be highly suspicious and might even try to find a way to control them. In the Percy Jackson realm, the other demigods would have mixed reactions. Some would be in awe of their magic, while others would be worried that they might bring too much attention from the wizarding world. The twins would have to work hard to gain the trust of both sets of characters.
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 Weasleys would probably be very welcoming to Bella. Molly would likely try to mother her just like she does with Harry. Ron might be a bit jealous at first, thinking Bella would steal some of Harry's attention. In the Twilight world, the Cullens would be cautious. Carlisle, being the rational one, would want to study this new connection between Bella and Harry. Edward might be a bit possessive over Bella still, but also curious about her new 'twin' and his world. Jacob would be confused and probably a bit angry, seeing yet another strange element in Bella's life.
Percy would be really conflicted. On one hand, he's used to following the orders of the gods, but on the other, he knows the Avengers are heroes. He'd probably feel guilty about banishing them. The Avengers would be confused and angry. They'd try to figure out who Percy is and why he's banishing them. Iron Man might try to use his technology to find a way out of the banishment, while Captain America would be more focused on trying to reason with Percy.
The gods in the Percy Jackson universe would have mixed reactions. Some might see the daughter as a potential threat or a powerful ally. Zeus might be initially suspicious, but if the daughter proves her worth, he could be an important figure in her story. Poseidon would be proud, as he was of Percy. In the Naruto world, the village elders would be cautious. They would want to make sure the daughter uses her powers for the good of the village. But characters like Iruka would be very supportive from the start, seeing the potential for great things in the daughter.
Annabeth would be devastated. She and Percy have a deep connection. She might go into a state of shock at first, then be filled with a fierce determination to find out who was responsible and make them pay. She would probably also be racked with guilt, thinking she could have done something to prevent it.
The gods would likely be very interested and a bit apprehensive. Zeus, for example, would be worried about Percy's new power disrupting the order of things. Athena might try to use her wisdom to figure out how to control or guide Percy in using his void powers. Poseidon would be conflicted, proud of his son's power but also concerned about how it will affect Percy's future and his relationship with the other gods and demigods.
Percy would probably be curious. He's always up for new adventures and meeting new people. He might immediately ask Harry about his magic and how it works. Annabeth would be more cautious. She'd be observing Harry, trying to figure out if he could be trusted. But once she realizes he's on the side of good, she'd start asking intelligent questions about the wizarding world, like how their education system compares to Camp Half - Blood's training.
Percy would probably be really curious about the wizarding world. He might ask Harry a million questions about how magic works. Harry, on the other hand, would be intrigued by Percy's ability to control water and his connection to the gods. Hermione would likely be very interested in learning about Greek mythology from Percy and his friends, and she might try to find books in the Hogwarts library about it. Ron might be a bit more hesitant at first, but once he sees Percy's sword - fighting skills, he'd be impressed.
The teachers at the school would be completely clueless. They'd be trying to regain control of the assembly, but when faced with gods, their normal disciplinary methods would be useless. One teacher might try to be brave and tell the gods to leave, only to be turned into a small, squeaking mouse by Hecate as a warning. Meanwhile, Percy and his friends would be scrambling to fix the mess before things got even worse.