Konan could be really interesting. In some fanfictions, she might have a different backstory or motivation that affects the Naruto vs Pain fight. For example, she could be secretly trying to stop Pain from going too far in his destruction of the Leaf Village.
Jiraiya could be a great addition. Since he was Pain's teacher, his presence could add a lot of depth to the story. He could offer insights into Pain's past and also help Naruto understand Pain better.
The main characters in the 'Pain and Gain' real story are the bodybuilders involved in the criminal activities. I'm not sure of all their names off the top of my head, but they were a group of guys in Florida who got into a lot of trouble for their actions.
The main characters in the 'Pain Hustlers' real story might be the pharmaceutical sales representatives who are at the front lines of promoting pain medications.
I don't really know who the main characters are since I haven't read or watched it. But they could be patients, doctors, or people from pharmaceutical companies who are involved in the pain - related activities.
The main characters in the 'Pain Hustler' real story might include pharmaceutical executives who set the aggressive marketing strategies for painkillers. There could also be sales representatives who are in the thick of it, trying to push these products in hospitals and clinics. Additionally, patients who get caught up in the cycle of over - prescribing and the resulting addiction or harm would be important characters too. They are the ones whose lives are directly affected by the actions of the others.
Well, Naruto is obviously one of the main characters. He's the one who's going to be doing the beating. And Pain is also a main character in this context, as he is the opponent Naruto has to defeat.
In a 'naruto after pain fanfic', Naruto is key. However, characters like Tsunade are important too. She can lead the medical and administrative aspects of the village's recovery. Then there are Naruto's friends like Kiba and Choji. They can help with the physical tasks of rebuilding, and also in the security patrols around the village to prevent any new threats.
Obviously, Naruto and Pain are the main characters. Naruto, the energetic and determined ninja from Konoha. Pain, on the other hand, is the complex antagonist with his own set of beliefs about peace through pain. Their interactions are likely to be the focus of the fanfiction.