Definitely Percy and Tony Stark. Percy is this young, powerful demigod from a world of magic and myth, while Tony is a genius billionaire with high - tech gadgets. Their interactions would be filled with banter. Tony would be constantly trying to figure out how Percy's powers work and Percy would be both amazed and a little put off by Tony's arrogance at times.
A Percy Jackson and Avengers crossover fic could be really exciting. Imagine Percy's water powers combined with Thor's lightning. They could create some really powerful elemental attacks. And the Avengers could be baffled by Percy's ability to talk to sea creatures. Maybe they'd team up to fight a common enemy like a new super - powerful Titan or a group of evil Asgardian - Greek hybrids.
One possible plot could be that the gods in the Percy Jackson universe sense a great threat from another dimension (the Marvel universe). Percy and his friends are sent to team up with the Avengers. Percy's water powers could be useful in fighting villains like Electro. Annabeth's strategic mind would assist in planning battles against foes like Loki. They all have to learn to work together, with Percy and the Avengers initially having some clashes due to their different ways of handling things.
If Percy Jackson were to join the Avengers, it would be chaos at first. Percy is used to operating on his own or with a small group of demigods. The Avengers are a big, organized team. However, his powers would be a great asset. He could use his water manipulation to put out fires caused by the Hulk's rampages or to flood areas to stop advancing enemies. His loyalty and courage are also top - notch, which the Avengers would come to respect. His connection to Poseidon might also bring in some new elements to the story. Maybe Poseidon could offer some assistance or advice in certain situations. And Percy's experiences with different gods and monsters would give the Avengers new perspectives on the threats they face.
Well, one possible plot could be that the gods in the Percy Jackson universe notice some strange energy disruptions caused by the Infinity Stones in the Avengers' world. Percy and his friends are sent to investigate. They meet the Avengers and at first there are misunderstandings, like the Avengers thinking Percy's powers are from some new form of alien technology. But then they realize they need to work together to stop a common enemy, perhaps a new powerful being that is drawn to the combined power of the demigods and the Infinity Stones.
Some of them might be entertained. For example, Thor could see the similarities and differences between his world and Percy's world of gods and monsters and find it humorous. Others like Black Widow might analyze the characters' motives and strategies in the fanfic as she is used to understanding people's minds.
They might be really confused at first. The Avengers are from a world of superheroes and high - tech, while Percy Jackson's world is full of Greek mythology. They'd probably find the demigod concept strange and the adventures in Camp Half - Blood very different from their battles against supervillains.
One possible plot could be that the Avengers are facing a powerful new threat that has some connection to the Greek mythology world. Percy Jackson and his friends are called in to help. Maybe it's a villain who has the power to control both technology like the Avengers are used to dealing with and also the elements of Greek magic. They would have to combine their skills, with Percy using his water - controlling abilities and the Avengers using their high - tech weapons and superpowers to defeat the villain.
If Percy Jackson meets the Avengers in a fanfic, there would be a clash of cultures at first. The Avengers are used to high - tech and modern warfare, while Percy comes from a world of Greek mythology. But they could learn from each other. Percy could teach them about the power of the gods and the importance of prophecies. The Avengers could introduce Percy to new forms of technology. And in battle, Percy's ability to control water could be a great asset. For example, he could create huge tidal waves to stop enemy forces or use water to put out fires. He could also use his powers to heal himself and others if he has learned that aspect of his powers. Overall, it would be an exciting combination of two very different fictional universes.