Annabeth could be one of the people to help Percy train. She's very intelligent and could come up with strategic training plans for him. She might teach him how to analyze his opponents' weaknesses more quickly.
In fanfiction, Percy might train by sparring with other half - bloods. They could use their unique powers and weapons, like Percy with his sword Riptide. This would improve his combat skills and his ability to think quickly in battle.
Well, it could be about Percy facing some new and unique challenges while training in isolation. Maybe he discovers a new power within himself during this alone time. He could be training to master a new weapon or combat style, like learning to fight with a double - edged sword that has some special powers. And he might encounter some mythical creatures that are drawn to his solitary training, which he has to fight off while still trying to improve his skills.
There could be some minor gods or spirits as supporting characters. For instance, a nymph that lives near Percy's training area could provide him with fresh water or food when he needs it. A small god of the forest could give Percy advice on how to use the natural elements around him for his training. And there could be an old demigod who has retired from battles and now lives near Percy's training place. He shares his old war stories with Percy, which gives Percy new ideas and motivation for his training.
He might go on a solo adventure to discover more about his powers. He could encounter new mythical creatures that he hadn't seen around the camp. Maybe he'll meet some other demigods who are on the run or have their own secret quests.
One common theme is loyalty. In the Roman Camp, loyalty to the cohort and the camp as a whole is highly emphasized, and fanfictions often explore characters' loyalty being tested. Another theme is identity. Demigods in the Roman Camp may struggle with their dual identity as half - god and half - mortal. Power struggles are also common, as different demigods may vie for leadership or recognition within the camp.
The plot could involve Percy being abandoned by camp because the camp leaders fear his growing power. He wanders the world, feeling lost and angry. Percy then encounters a mysterious figure who offers him a way to get revenge on the camp. However, Percy, being a hero at heart, realizes that taking revenge won't solve anything. Instead, he decides to find evidence to clear his name and expose the real danger that the camp is ignoring while he was being pushed away.
Well, he might face new monsters. For example, some ancient and more powerful versions of the ones he's already fought. Maybe there are new quests waiting for him at the camp, like finding a lost artifact that has the power to either save or destroy the camp.
In this kind of fanfiction, a common concept is Percy's role in the camp hierarchy. Since he's a 'god' now, he might be at the top, which could lead to jealousy or admiration from others. Also, the fanfiction might explore how Percy's training changes. Instead of the regular demigod training, he could be getting special training from the elder gods. And perhaps his quests are now on a grander scale, involving saving not just the camp, but the entire world of gods and mortals.
He could go to New York City. It has a lot of water sources like the Hudson River where he can use his powers. Also, there are many places to hide from monsters.