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.
In the fanfic, Percy might be really nervous when he meets Annabeth's parents. He could be worried about making a good impression. Maybe he tries to be on his best behavior, like being extra polite and respectful.
In the fanfic, when Percy meets Nico at the Lotus Hotel, they could form an alliance. Since both of them have had their fair share of battles and challenges, they might decide to team up. They could explore the hotel together, looking for hidden secrets or ways to get out if they're trapped. And perhaps they'll meet some interesting characters within the hotel that will change their perspective on things.
Well, it's possible that Ash and Mewtwo team up in the fanfic. They could face a common enemy together. Mewtwo's incredible psychic powers combined with Ash's experience and determination would make them a formidable duo. And perhaps this encounter would change Ash's view on some things, like the true nature of Pokémon battles.
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.
Well, it depends on the context of the fanfiction. One possibility is that Bella has gained new powers or abilities since they last met. This could change the dynamic between her and the Cullens. She might show off her new skills, and the Cullens could be either impressed or a bit intimidated. Another scenario is that there's a new threat in town, and they have to team up again despite their past differences.
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.
They might have a really emotional reunion. Percy could give Annabeth a big, warm hug and they'd start reminiscing about their past adventures together, like the time they were in the Labyrinth or on their quests.