In a more complex interaction, there could be some misunderstandings at first. The Fire Emblem characters might not understand the concept of Greek gods and demigods right away. Percy and his friends would have to explain it. And the demigods might be confused by the different political systems and magic in Fire Emblem Awakening. But through communication and shared experiences, they would gradually form strong bonds. For instance, they could face a powerful enemy that threatens both their worlds, and in the process of fighting it, they learn to trust and rely on each other.
A third idea is a role - reversal type of story. The demigods from Percy Jackson end up in the world of Fire Emblem Awakening. Percy could use his water - based powers in a unique way in the battles of Fire Emblem. Annabeth could use her strategic mind to help the Fire Emblem characters plan their battles better, and they all work together to defend the kingdoms in Fire Emblem Awakening from an invasion.
If Percy meets Doctor Strange, their powers would interact in a very different way. Doctor Strange's magic could potentially manipulate the essence of Percy's water powers in ways that are not possible in the normal world of Percy Jackson. Maybe Strange could use his magic to turn Percy's water into a magical substance that has additional properties like being able to heal or disrupt magical enemies.
Annabeth, if she were with Percy, would be more interested in the architecture and strategic planning of Troy. She could offer her knowledge to the Trojans or the Greeks, but they might not trust her either. And Percy would have to protect her from those who might see her as a threat or a sorceress.
Percy would probably be very cautious around Morathi at first. Given his experiences with tricky and powerful beings, he'd be on guard. Morathi, being the conniving character she is, might try to charm Percy or manipulate him. For example, she could use her allure to make Percy lower his defenses, but Percy's loyalty to his friends and his own sense of right and wrong would likely make him resist.
Percy would probably be a bit wary at first. He's used to the demigod world and Fury's whole S.H.I.E.L.D. thing would seem really different. But Fury would be all business. He'd likely be sizing Percy up, trying to figure out how to best use his powers.
The two could have some really interesting conversations. Percy could talk about his adventures with Annabeth and the other demigods, while Jacob could share stories about his pack and his experiences in the forest. They might also compare their different kinds of powers. Percy's control over water and his ability to withstand a lot of physical damage compared to Jacob's enhanced senses and super - strength as a werewolf. And they could learn from each other. Percy could teach Jacob some Greek, and Jacob could show Percy how to track better in the wild.
Percy would likely be initially cautious yet intrigued by Rory. He might be in awe of her combat skills and the way she commands in battle. Rory, on the other hand, would be curious about Percy's powers related to the sea and his connection to the Greek gods. They would probably start by exchanging stories about their respective worlds and gradually build a bond based on mutual respect and the need to face common threats.
Percy would probably be initially cautious when interacting with Egyptian gods. For example, when meeting Ra, the sun god, Percy might be in awe but also a bit hesitant as their powers are so different. He would need to show respect as he does with the Greek gods. The Egyptian gods, in turn, might be curious about Percy's abilities, especially his control over water which is not as prominent in Egyptian mythology.
In a fanfiction, the characters' personalities would greatly influence their interactions. Percy is a bit of a rebel and a free spirit, which could either clash or mesh well with the more structured Avengers. Thor, being a god - like figure in his own right, might recognize the power and divinity within Percy and the other demigods. They could share stories about their respective mythologies. Natasha Romanoff could take an interest in the demigods' combat training, which is different from her own. She might learn some new fighting techniques from them, while also teaching them some of her stealth and espionage skills.
At first, they might be cautious around each other. Aquaman, being the king of Atlantis, would be wary of this strange demigod from the surface world. Percy, on the other hand, would be in awe of Aquaman's power and the strange underwater world. But as they face challenges together, like fighting off some menacing sea creatures or stopping a villain who wants to control the ocean, they would start to respect and rely on each other. Percy might crack some jokes to lighten the mood, which Aquaman might find strange at first but then start to appreciate as a sign of Percy's courage.