One of the main themes in 'percy is half demon fanfic' is the battle between good and evil within Percy. Since he is half - demon, he has that dark side, but he also has a good side. There's also the theme of isolation. He might feel alone because of his unique nature. And finally, the theme of discovery, as he discovers more about his demon heritage and what it means for him.
Well, a popular 'percy is half demon fanfic' could be one where Percy has to hide his demon side from his friends at first. This creates a lot of internal conflict for him. He might be afraid of being rejected if they find out. As the story progresses, his friends might discover his secret, and then they have to decide whether to accept him or not. This type of plot often makes for a really engaging 'percy is half demon fanfic'.
Percy's jealousy in a 'Camp Half - Blood' fanfic could be a result of his insecurities. Despite his heroic deeds, he may still doubt himself at times. If he sees someone else who seems more talented or popular in the camp, and that person is getting attention from the people he loves, he'll be jealous. It's like he's afraid of being replaced. This jealousy can lead to some interesting character development in the fanfic, as he has to confront these feelings and either overcome them or let them get the best of him.
His relationship with Annabeth could be strained. She might be initially afraid of the changes in Percy due to his demon half. However, over time, as she sees that he's still the same Percy at heart, they could work through it and their relationship could become even stronger as they face this new challenge together.
The traditional Titans could be antagonists. Since Percy has only half - Titan blood, they might see him as a threat or a tool to use against the gods. Kronos, if he were to somehow return or have a remnant of his power, would be a powerful foe. He could try to manipulate Percy's Titan side to turn him against the gods.
One common theme is the struggle for acceptance. Since the character is half - demon, they often face discrimination from both humans and demons in the Naruto universe. Another theme is the exploration of new powers. As a half - demon, the character usually has a unique set of abilities that they need to discover and master.
Well, Naruto would obviously be the main character as the story is centered around him being a half - demon. There might also be characters like Sasuke. Sasuke could be involved in Naruto's journey, perhaps initially being suspicious of Naruto's new powers but later coming to accept and even help him control them.
Yes, there are quite a few. You can start by looking on fanfiction websites like Archive of Our Own. There, you might find some interesting 'Percy Player Camo - Half - Blood' fanfics that range from adventure - filled stories to ones that focus more on character relationships. Just search for the relevant tags.
One idea could be that Percy has to struggle with the dark urges that come with his demon half. For example, he might be tempted to use his newfound, more sinister powers in battle, but he has to resist to stay true to his friends and his own moral code.
One idea could be that Percy has to hide his Titan heritage from the other demigods at Camp Half - Blood. He discovers new powers related to his Titan side that are different from his godly powers. For example, he might have the ability to control certain aspects of nature in a more primal way compared to his Poseidon - related powers.