Maybe they will have a friendly conversation, reminiscing about the past. Percy could share his new adventures, and Calypso might tell him how she has been since they last met.
They could also form an alliance. Given Percy's experience in battles and Calypso's knowledge of magic and the island's secrets. Together, they might face a new threat that emerges in the fanfic. Maybe there's a dark force approaching the island, and they need to combine their powers to defend it. Percy's demigod strength and Calypso's magic could be a powerful combination.
When Annabeth meets Calypso in fanfiction, it might also be a very emotional encounter. Calypso has had her heart broken by Percy's departure, and Annabeth might feel some guilt about that. They could have a deep conversation about love, loss, and the nature of the gods' interference in their lives. This could lead to a new understanding between them, and they might find a way to move forward in a more positive way.
Perhaps in the fanfic, Ash has achieved a lot in his Pokémon journey, and Misty has also become a more skilled Pokémon trainer. When they meet again, they start to compare their experiences. Ash could show Misty his new and powerful Pokémon, and Misty could introduce Ash to some new training techniques she has learned. And then they decide to train together for a while to improve their skills even more.
In a 'Percy meets Poseidon' fanfic, Percy might seek advice from Poseidon. Maybe he's facing a new and powerful enemy in the demigod world, and Poseidon could offer some godly wisdom or a special weapon to help him. For example, Poseidon could give Percy the power to control a new aspect of the sea, like the ability to summon sea monsters that are loyal only to Percy.
In this kind of fanfiction, they might have an adventure together. Maybe they'll face a new monster that they haven't encountered before. For example, a mythical creature from a less - known part of Greek mythology.
Perhaps their relationship becomes more of a friendship based on mutual understanding. Percy has had his own share of being in difficult situations, and Calypso has been alone for a long time. When they meet again, they might share their feelings and experiences, which deepens their connection and makes their relationship more than just a memory of their past encounter.
Maybe Harry finally stands up to Aunt Marge in a more assertive way this time. He could use his magic subtly to teach her a lesson without getting into too much trouble.
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.
When Percy Jackson meets Poseidon in fanfiction, it could be a very emotional encounter. Percy has always had a complex relationship with his father. They could start by just looking at each other, a moment of silence filled with unspoken words. Then, Poseidon might start by apologizing for not being there for Percy as much as he should have. He could tell Percy about the constraints of being a god and having to abide by certain rules. Percy, on the other hand, could share his experiences at Camp Half - Blood and how he has felt like an outcast at times. This meeting could lead to a new understanding between them, and perhaps Poseidon could offer Percy a chance to become more involved in the world of the gods, which would bring new adventures and challenges for Percy.
In fanfiction, when Percy meets Kronos in Tartarus, it could be a battle of wits. Percy has faced many challenges before and learned from them. Kronos, on the other hand, is cunning. Percy might try to outsmart Kronos by using the chaotic nature of Tartarus against him. He could lead Kronos into a trap where the very essence of Tartarus, like the rivers of fire or the howling winds, would weaken the Titan.
They could team up to face a common threat. Fanfiction loves to create crossovers where characters join forces. There could be a new villain that is causing trouble in the school, and Percy and Carter, with their unique skills, could combine their powers to defeat it. For example, Percy could use his water - based powers to create a distraction while Carter uses his magic to strike at the enemy.