Well, it could be that the old heroes, like from Greek mythology, are brought back to life in modern times and meet Percy Jackson. They might initially be confused by the modern world Percy lives in. For example, they could be shocked by things like cars and cell phones. Then, they might team up with Percy to fight a new threat that endangers both the old and new worlds of heroes.
The old heroes would probably be in awe of Percy's powers at first. After all, he has unique abilities that they may not have seen before. Percy, on the other hand, would be respectful but also curious about their tales. They might exchange stories of their adventures, with Percy listening intently to the old heroes' accounts of battles in ancient times.
In fanfiction, when Percy meets the old heroes, it could be a really cool adventure. Maybe they would share their tales of glory, and Percy would be inspired. He could also find out about some long - lost secrets of the demigod world that only the old heroes knew. This could help him in his future quests, like facing new and more powerful monsters. The old heroes might also test Percy to see if he's worthy of their knowledge and respect.
In a Percy Jackson meet old teachers fanfiction, there could be a lot of reminiscing. Percy might recall the tough lessons he learned from his old teachers at Camp Half - Blood. Maybe he meets Chiron again, and they talk about the old days of training demigods. It could also be a chance for Percy to see how much he has grown since those early days under their guidance.
Chiron is definitely one of the most likely old teachers to appear. He has been a major figure in Percy's life, guiding him through his early days at Camp Half - Blood. Another could be Mr. D, the god Dionysus in disguise. He was always there, grudgingly watching over the demigods. And of course, there were the various instructors at Camp Half - Blood who taught Percy combat skills, like sword - fighting and archery. They could all make interesting appearances in a meet - old - teachers fanfiction.
He might meet some native Alaskan spirits. These spirits could be like the nature spirits he has encountered before but with their own unique Alaskan characteristics.
Percy might meet an old enemy who has somehow been resurrected or changed in the future. This enemy could be more powerful and have a new plan to take over the world or destroy the demigods. Or he could meet a group of time - traveling demigods from an even further future who are trying to fix something in Percy's future that has gone wrong.
Percy might encounter Baba Yaga. She is a well - known figure in Russian folklore. She could be an adversary, testing Percy's skills and his knowledge of the magical world. Or perhaps she could be a source of information if Percy manages to earn her respect. He could also meet the Rusalki, water nymphs from Russian mythology. Given Percy's connection to water, it would be interesting to see how he interacts with them.