They would surely meet Harry Potter. Harry could be curious about their different magical abilities and background. Hermione would also be there, probably peppering them with questions about their own world's magic. Ron might be a bit skeptical at first but warm up to them eventually.
Dumbledore would be an important character they'd meet. He'd be intrigued by Percy and Nico's presence. He might see their arrival as part of a bigger plan or prophecy. Hagrid would also be around, and he could show them the magical creatures at Hogwarts. They might also cross paths with Draco Malfoy, who could be a rival or an unexpected ally depending on the situation in the fanfiction.
Well, perhaps Percy and Nico could be transferred to Hogwarts through some sort of magical accident. Maybe they'd have to deal with the different magical system there compared to their own world. They could make new friends among the Hogwarts students and get involved in the typical Hogwarts adventures like the Triwizard Tournament or dealing with a new dark threat.
A powerful monster from the demigod world that has a vendetta against Percy and Nico could be the main antagonist. It disguises itself as a teacher or a student and slowly starts to manipulate things in the school. It tries to isolate Percy and Nico from their friends and then attack them when they are at their weakest.
Percy would probably be very friendly and try to form study groups with the Hogwarts students. He's used to being a leader, so he might even start some new clubs. Thalia would be a bit more standoffish at first, but once she gets to know some students, she'd be very protective of them. Nico would be the mysterious one. The Hogwarts students might be a bit scared of him at first, but once they see his softer side, they'd become friends.
In this kind of fanfiction, they might face challenges adjusting to the new magical environment. Percy could be confused by the different types of magic in Hogwarts compared to his own demigod powers. Nico might struggle with the more structured and rule - bound nature of Hogwarts. Thalia could find it interesting but also be a bit rebellious against some of the Hogwarts traditions.
It could be four new students, each representing a different 'flavor'. Maybe a spicy - flavored character who is bold and adventurous, always getting into trouble. Then a sour - flavored one who is a bit of a skeptic and always questions things. A salty - flavored character could be the reliable and down - to - earth type, and a sweet - flavored character who is the heart of the group, always there to cheer everyone up.
The main characters are obviously Percy and Nico. Percy, a well - known and powerful demigod, and Nico, who has his own unique powers and a rather troubled past.
The camp leaders might betray them. If there is a power struggle within the camp, and Percy and Nico are seen as threats to the current leadership's power, the leaders could set them up. They could make it look like Percy and Nico are breaking camp rules or endangering the other campers, which would lead to the rest of the camp turning against them.
They could have all sorts of adventures. Maybe they'd get sorted into different houses and have to deal with the rivalries that come with that. Percy might use his water - controlling abilities in the Hogwarts' lake, and Thalia could use her lightning powers during a stormy Quidditch match. Nico could explore the Hogwarts' underground secrets, using his underworld - related skills to uncover hidden chambers.
Well, one possible plot could be Percy and Nico having to deal with typical high school problems like bullies. Percy might use his water powers in a discreet way to stop them. Nico could be the mysterious loner at first but then make some real friends as he shows his cool powers. And they might also have to hide their demigod identities from the normal students.
Well, Nico and Percy are the main ones. Nico, who might have his own motives and backstory for standing up for Percy. He could be driven by friendship, loyalty or a sense of justice. Percy, on the other hand, is the recipient of Nico's support. There could be side characters too. Maybe Annabeth, Percy's girlfriend, who could be involved in the situation in some way, either supporting Nico's stand or being part of the conflict that Percy is in.