Perhaps it could be a centaur who was once a great guardian of the forest but has been broken by the encroachment of dark forces. Or it could be a minor god who was supposed to protect a certain aspect of the world but has failed and is now in a broken state. There are many possibilities within the rich lore of Percy Jackson.
Well, it could be about a guardian figure in the Percy Jackson world who has been broken in some way. Maybe a protector who has failed in their duty, or perhaps has had their spirit or power broken. It might explore their journey to redemption or how their broken state affects the other characters around them.
It could be an old demigod who has retired from active quests but still has a lot of knowledge and power. Maybe someone like Clarisse's older relative who has seen a lot in the demigod world and is now tasked with looking after Percy.
Artemis herself could be considered the 'Guardian of the Hunters' in a way. Since she is the goddess who leads the Hunters, she has a natural role of protecting them. But in fanfiction, it could also be a character like Thalia. She has a strong connection to the Hunters and her skills and powers would make her a great guardian.
Artemis could be seen as the 'guardian of the hunt' in Percy Jackson fanfiction. As the goddess of the hunt in Greek mythology, she has the power and the authority to oversee everything related to the hunt. She could be the ultimate protector of the hunters and the hunting grounds.
One idea could be that Percy uses his water powers in a unique way to protect Azula. Maybe he creates a water shield around her during battles, which is different from the fire - based defenses she's used to in the Avatar world.
In Percy Jackson fanfiction, the 'Guardian of the Hunters' could be a character who protects the Hunters. It might be someone with special powers or a deep connection to the group. Maybe it's a new character created by the fanfic writer to add more drama and adventure to the story.
There could be many fanfiction ideas around the Percy Jackson series involving a 'guardian' and a 'tent'. Maybe the tent is a magical place where the guardian protects Percy from some new threats. For example, it could be a tent that exists in a realm between the mortal world and the world of the gods, and the guardian has special powers to keep it hidden.
One great 'Percy Jackson Guardian Thalia Fanfiction' is 'Thalia's New Quest'. It shows Thalia in a whole new adventure, facing challenges that really test her skills as a guardian. The author does a great job of portraying her strong and independent nature.
A powerful Titan who has escaped from Tartarus could be the main antagonist. He might be seeking revenge on Artemis for her role in the previous battles against the Titans. This Titan could have new and terrifying powers that make him a formidable foe for Percy and Artemis.
A possible main antagonist could be a rogue demigod who was once rejected by the Hunt and now wants revenge. This demigod could have allied with some powerful monsters and is constantly causing trouble for the Hunt. For example, they might be stealing important artifacts or sabotaging the Hunt's missions.