I'm not sure specifically as there could be many different takes on this. It might be about Percy being in a dangerous situation and Quetzalcoatl, a powerful figure from mythology, coming to his rescue in the context of a fan - created fictional story.
There's no way to know for sure who the author is without more information. It could be anyone who is a fan of the relevant source material (maybe Percy Jackson series) and has an interest in Quetzalcoatl from mythology.
Percy could have saved fanfiction when his actions in the original series led to a new genre of fanfics. For example, if he did something unique that inspired a specific type of story, like a 'Percy's Quest for Redemption' type of fanfic. Another time might be when he was a part of a crossover fanfic that combined different universes and his character was the key to making it work. He could have also saved fanfiction by being a character that inspired different interpretations. Some writers might see him as a hero, while others as a more complex anti - hero, and these different views created diverse and interesting fanfics.
In a fanfiction, Harry as a Quetzalcoatl Animagus could play a crucial role in a battle against Voldemort. His Animagus form could be resistant to certain dark spells, and he could use the large size and strength of the Quetzalcoatl to his advantage. Maybe he could also communicate with magical creatures from the Americas that are drawn to his new form, and they could help in the fight against the Death Eaters.
It's likely that the main characters from the original 'Highschool DxD' series would still play important roles. Maybe Issei Hyodo would be there, adapting to the new quetzalcoatl - influenced environment.
I'm not sure specifically as there could be many different interpretations in fanfiction. It might be about Percy Jackson being rescued by Chaos in a situation where he's in great danger, perhaps from a powerful enemy that he couldn't defeat on his own.
First, Percy's heroism in the original work could have been translated into fanfiction, attracting more readers and saving a floundering story. Second, his relationships with other characters, like his friends or enemies, might have been explored in a fanfic in such a deep and interesting way that it saved the piece from obscurity. Third, Percy's unique abilities and adventures could have provided a rich source of material for fanfiction writers. They could build on his existing storylines, adding new twists and turns, which made the fanfics stand out and in a sense, be 'saved' from being dull or unoriginal.
In some of these fanfictions, there could be a focus on the mythology of Quetzalcoatl integrated into the Highschool DxD universe. This could lead to exciting tales where the characters have to face off against threats related to this ancient mythology while also dealing with the typical high - school drama and the battles that are characteristic of the DxD world. There might be new magical abilities or artifacts inspired by Quetzalcoatl that change the course of the story.
Well, having a Quetzalcoatl as a familiar would be extremely powerful for Harry. A Quetzalcoatl is a mythical and magnificent creature. It could help Harry in many ways, like flying faster than a broomstick, and its magical abilities might be beyond what we've seen in the regular 'Harry Potter' world. Maybe it could sense danger from afar and protect Harry more effectively.
In the 'percy jackson saved by chaos fanfiction', Percy Jackson and Chaos are central. Percy, the demigod with his green eyes and black hair, is the focus of the rescue. Chaos, on the other hand, is this mysterious and powerful being. But it's not just them. There could be other characters that play important roles. Grover, Percy's satyr friend, might be there, worried sick about Percy. And then there could be new characters created by the fanfiction author. Maybe a prophet who foresaw Percy's encounter with Chaos and tried to guide him before the danger even occurred. Or an ancient being that has a connection to Chaos and is either helping or hindering Percy's rescue.