Kakashi Sensei might be in it too. As Naruto's teacher, he would likely be one of the first to suspect something is off and try to help Naruto. Then there are characters like Shikamaru who, with his intelligence, could play a role in either helping Naruto or trying to figure out the mystery behind his state.
Obviously, Naruto is the central character as the title 'naruto goes mad' implies. Sasuke often plays a crucial role too. He might be the cause of Naruto's madness in some cases, like if he betrays Naruto again in a more extreme way. Sakura could also be involved, perhaps trying to bring Naruto back from his madness. And Kakashi, as Naruto's former teacher, may try to figure out what's wrong with Naruto and find a way to help him.
Naruto's friends like Shikamaru and Choji could also be part of 'Naruto Controls Heat' fanfictions. Shikamaru might use his intelligence to come up with strategies that incorporate Naruto's heat - controlling ability. Choji, on the other hand, could be a source of support and a test subject in some cases, for example, to see if Naruto can control the heat in a way that doesn't harm Choji when they are training together.
There are also often new or side characters created specifically for the fanfiction. These could be villains who oppose Naruto's resurrection or allies who help him adjust to the new world he wakes up in. For instance, a mysterious sage who has knowledge about the resurrection process and guides Naruto through the initial stages of his return.
Naruto himself is often a central figure in these fanfictions. His son or daughter might be the ones inheriting his powers or his legacy. Sasuke is also common, as his skills and story are so intertwined with Naruto's. Hinata could be involved too, especially if it's about the inheritance within the Hyuga clan. And of course, Kakashi, as he has a lot of knowledge and skills that could potentially be passed on to the younger generation.
Sasuke could be a character in such fanfiction. Maybe he has some sort of unexpected encounter with Naruto while Naruto is in the shower, which could lead to a tense or even reconciliatory moment between them.
Obviously, Harry himself would be the main character. His friends like Ron and Hermione are also likely to be involved. They would probably try to support Harry or figure out what's going on with him.
Well, Naruto is the main one. But also, Kakashi could be involved. He might be a bit amused at first but then help Naruto figure out how to use his new body to his advantage in combat. And then there's Hinata. She could have an interesting reaction, perhaps being more shy around Naruto as a girl, or she could be more empathetic as she also has her own insecurities.
The most common character is Naruto himself. In addition, other Konoha 11 members are often included. Shikamaru might be involved, using his intelligence to plan the mission better. Ino could use her mind - control jutsu in some creative ways to assist Naruto. And then there are the possible love interests or the targets of the seduction. They could range from a mysterious kunoichi from a far - off land to a well - known figure within the Naruto universe who holds some crucial information that Naruto needs to obtain through seduction.
Naruto is often involved. Since he is the main character of the original series, it's natural that in fanfiction about Forbidden Jutsu, he would be curious or accidentally get involved with these powerful techniques. Sasuke is another common character. His thirst for power could lead him to seek out Forbidden Jutsus.
Sakura could also be involved. There might be fanfiction where Sakura enters into a marriage contract with Naruto, perhaps in an alternate universe where their relationship took a different turn. This could explore a more complex dynamic between them, different from the one - sided love Sakura had for Sasuke in the original.