It could be Carter Kane. His leadership skills and his deep knowledge of Egyptian magic would be crucial in the story. He is more reserved than Sadie but has a strong sense of duty. When paired with Percy, he could learn a lot about different ways of fighting and protecting, and his character growth as he adapts to working with demigods would be an interesting aspect of the fanfic.
I think Percy would be the most interesting. His laid - back yet brave personality would contrast with the more serious Kanes, creating some really fun dynamics.
Well, it might start with Percy and the Kanes being suspicious of each other at first. But as they get to know about the threats looming over both their worlds, they start to work together. Percy could teach the Kanes about Greek mythology and his experiences with the gods, while the Kanes could share their knowledge of Egyptian magic. They could also explore each other's territories, like Percy showing them Camp Half - Blood and the Kanes taking him to the House of Life.
Carter and Annabeth could be a great pairing. Carter is very knowledgeable about Egyptian mythology and magic, and Annabeth is brilliant when it comes to Greek mythology and strategy. They could share their knowledge and come up with some amazing plans. They might start off a bit competitive, each thinking their own mythology is better, but as they face challenges together, they'd start to respect and rely on each other.
It's hard to say for sure, but it could be Harry Potter. His ability to perform a wide variety of spells, his experience in fighting dark wizards, and his connection to the powerful magic of love could give him an edge. Also, he has the support of his friends at Hogwarts who are also very skilled in magic. In a fight against the threats in the Percy Jackson world, he could quickly adapt his magic to deal with things like monsters.
Percy would be very interesting. His charm and his ability to get into and out of trouble are always fun to read about.
I think Anubis could be an interesting character in this fanfiction. He has his own mysterious nature in the Kane Chronicles. If he meets Percy, there could be some really strange and exciting interactions. Anubis could be intrigued by Percy's connection to the Greek gods and his unique powers. Maybe Anubis would even offer some help or pose a new threat, depending on how the story is written.
Percy and Alex from the Unwanteds would be really interesting. Alex has the power of transformation, and seeing how Percy would react to that and how they could use that power together in a fight or a mission would be cool.
Well, in such a fanfiction, Percy and the Kanes might team up to fight a common enemy. Maybe a powerful ancient monster that neither of them could defeat alone.
Annabeth from Percy Jackson could be the most interesting. She's highly intelligent and strategic. In a crossover with Twilight, she would be the one trying to figure out how the vampires work and how to use their abilities to their advantage. She might also be a bit suspicious of them at first and would be constantly analyzing their every move, which could lead to some really engaging scenes in the fanfic.
Percy himself would be very interesting. He has all his demigod skills and his experiences always lead to some exciting situations. Just imagine him trying to have a normal beach vacation but then getting dragged into an underwater adventure by some sea - related mystery.