It could be Hephaestus. He is the god of blacksmiths and is known for creating amazing weapons and armors.
Maybe it's Chiron. He has always been looking out for Percy and might have found or commissioned someone to make this new armor for him. Chiron has a lot of connections and knowledge, so he could have arranged for Percy to get this new and improved protection. Another possibility is that it's given to him by a mysterious new character in the fanfiction, someone who has seen Percy's potential and wants to help him in his battles against the forces of evil.
There's a chance it could be given by Poseidon. As Percy's father, he would want to ensure his son's safety. He might have had his own underwater smiths create a special armor for Percy. The armor could be made from rare sea - based materials and enchanted with Poseidon's power, giving Percy an edge in combat both on land and in water.
Well, perhaps it's a sleek, form - fitting armor that has the ability to change its appearance based on Percy's needs. It might start as a simple chainmail but when he's in danger, it could transform into a full - body plate armor with glowing blue accents that represent his powers. The new armor could also be enchanted to make him faster in water and more resistant to fire, which would be really useful considering the various challenges he faces in the Percy Jackson universe.
Some fanfictions depict Percy's armor as having a trident emblem on it, which glows when he's near water or in danger. It could be made of a combination of materials, not just celestial bronze, but also some kind of sea - gem that gives it extra power.
Often, the armor is related to the character's godly parentage. For Percy, being Poseidon's son, his armor could have elements related to the sea, such as seaweed - like patterns that are actually enchanted to protect him better in water. Fanfiction allows for a lot of creativity when it comes to these aspects of the Percy Jackson world.
It could be Chiron. He's always looking out for Percy and the other demigods. He might have discovered some ancient weapons and thought Percy was the best one to wield them.
Well, she could be a new demigod. Maybe someone who just arrived at Camp Half - Blood. She might have some unique powers that catch Percy's eye, like being able to control plants in a really cool way. That would be different from his past relationships and add a new dynamic to the story.
Perhaps he gets the power of astral projection. He could send his spirit out of his body to explore areas that are otherwise inaccessible or to spy on his enemies. This would be a very useful power especially when dealing with secretive foes or trying to find hidden places in the mythological world.
There might be new gods or minor deities introduced. They could be ones that have been forgotten or ones that are from a different part of the mythological world. Their appearance could change the power dynamics in the story. They might either help or hinder Percy in his second - chance journey.
Perhaps it's a gift from his father, Poseidon. Since Poseidon has control over the sea and all things related to water, he might have some connection to a power that gives Percy wings, like as a way to help Percy reach new heights both literally and metaphorically.
She could be the daughter of a minor god that hasn't been introduced much in the original Percy Jackson series. For instance, the daughter of Hecate. This would give her powers related to magic, which would be really cool in the context of the story. She could use her magic to help Percy and his friends in battles or to solve some of the mysteries they encounter.
There are many Percy Jackson fanfictions that incorporate a New York accent. Some might focus on how Percy's New York upbringing is reflected in his dialogue with that distinct accent. It could add a lot of authenticity and charm to the story. For example, when Percy is talking to his friends or getting into a scrape in the city, the accent can make his character come alive even more.