Another reason could be that the gods are bored and want to see some chaos or interesting interactions. They know that Percy's arrival in the Avengers' world will stir things up. His powers and personality are so different from the Avengers that there will surely be some unexpected developments. It could also be part of a bigger plan to unite different heroic forces for a future event that the gods foresee.
Perhaps the gods see a threat that only Percy and the Avengers together can defeat. So they send Percy to team up with them.
It could be that the gods want Percy to gain new experiences and knowledge from the Avengers' world. The Avengers have a different way of handling threats and protecting the world, and the gods might think this exposure will make Percy a better hero in his own realm. Also, it might be a test for Percy. The gods are known for their tricky ways, and sending him to a new and different group like the Avengers could be a way to see how he adapts and overcomes challenges outside of his comfort zone.
In the fanfiction, Percy might have some culture clashes with the Avengers. He comes from a world of Greek gods, and the Avengers are from a more modern, superhero - based world. He could introduce them to new concepts like the power of the Olympian gods. For example, he might tell them about how the gods can interfere in human affairs, which could change the Avengers' perspective on their own battles. Also, his combat skills, which are different from the Avengers', could be a great addition to the team. He is used to fighting mythological creatures, so facing off against some of the Avengers' foes might be a new and exciting challenge for him.
Maybe for the novelty. A feminized Percy would present a different take on a well - known character. Gods, being somewhat removed from mortal creativity, might find it fascinating to see how mortals can transform a male hero into a female one in their stories.
Maybe they are curious about how mortals re - imagine Percy in different forms. It could be a way for them to peek into the creativity of human minds.
Another option could be Black Widow. She's very good at adapting to new situations and using her skills in different ways. For Percy, who is coming from a very different world, she could teach him how to be stealthy and use his powers in a more covert way. She could also help him with understanding the political side of the Avengers, like dealing with government agencies and such, which Percy may not be used to in his world of demigods.
In fanfiction, Percy could hate the gods due to their lack of proper care for their demigod children. They are often absent and don't really step in to help when the demigods are facing real hardships. For example, Percy has been through numerous life - threatening quests where the gods could have made things easier but didn't. This builds up resentment towards them.
It might be popular because Percy is a beloved character. Fans like to see him in new and interesting situations, like being respected by the gods. It gives a fresh take on his story.
Well, maybe it's because fanfiction can take the story in all kinds of wild directions. The gods in the Percy Jackson world are used to a certain order and set of rules. Fanfiction might rewrite their fates or show them in unflattering or unexpected ways that they can't control, so they're scared.
Iron Man would be angry. He'd probably use his technology to try and track Percy down. He might also start to review all the security protocols to make sure no other traitors could do the same. Thor would be more of the 'let's fight him head - on' type, but the other Avengers would have to hold him back until they have a proper strategy.
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.
She could fit in by being a wildcard. Her abilities are likely not something the Avengers are used to. So, she could be the one to come up with unexpected solutions during missions. For instance, if they're trapped in a place, she might use her powers in a creative way to get them out.