It could be the traditional villains from the original story. Maybe some of the old enemies of Percy who have a vendetta against him. For example, the Titans or some rogue demigods who oppose him for power or personal reasons.
One common theme could be the exploration of Percy's inner strength. Through the torture, the story might show how he endures and overcomes. Another theme could be the reaction of his friends. They might be desperate to save him, highlighting the bonds of friendship. Also, it could explore the motives of the torturers, whether it's for revenge or some other dark purpose.
Percy might endure it through his own stubborn will. He's a demigod used to facing tough situations. In this fanfiction, he could be using his past experiences of fighting monsters and surviving hardships. He might tell himself that he's been through worse and this is just another trial he has to pass. So he grits his teeth and bears it as best he can, even when the torture in Tartarus is beyond what he's ever faced before.
Appropriateness is subjective to some extent. While some people might be interested in exploring the darker sides of a character like in 't challa gets tortured fanfiction', others may find it offensive or disturbing. If the fanfiction contains excessive violence and torture without any redeeming narrative or moral exploration, it's likely not appropriate.
I'm not sure specifically as there could be many different interpretations of such a fanfiction. It might involve a character named Neal facing some form of extreme distress or harm within the context of a fictional story created by fans.
It's not extremely common, but it does exist. Some fans are interested in exploring how Naruto would react under extreme duress. However, many other types of fanfiction, like Naruto's training arcs or his romantic relationships, are more prevalent. But still, for those who like a more edgy and intense story, 'naruto gets tortured fanfiction' can be appealing.
There are several reasons. Firstly, it gives an opportunity to explore the darker side of the 'Percy Jackson' universe. The original series is mainly about adventure and heroism, but fanfictions about torture can show the harsher realities that could potentially exist in that world. Secondly, it's a way to develop Percy's character further. Through torture, his beliefs, values, and relationships can be put to the test. For example, would he still trust his friends if he was tortured by someone they introduced him to? Thirdly, some fans might just enjoy writing and reading about extreme situations as it adds an element of shock and unpredictability to the story.
No. Fanfiction is meant to be a celebration of the source material and its characters. Torturing a character in a fanfiction is not in line with this purpose. It can create a negative and uncomfortable reading experience. There are so many other positive and interesting aspects of the characters and the story world that can be explored in fanfiction rather than focusing on torture.
I'm not sure specifically as I haven't read that particular fanfiction. But generally, it might involve Ginny facing some form of cruel treatment by the Carrows in a fictional and often dark scenario created by the fanfiction writer.