Kakashi could be a common character. He could be guiding the younger ninjas in their exploration of Naruto Mountain. There might also be appearances from the Akatsuki members. They could be looking for something valuable on the mountain, like a powerful chakra source or a hidden weapon. And of course, the Hokage, whether it's Tsunade or another one, would be in charge of any major events or threats related to the mountain.
Naruto himself is often a central character. He might be exploring the secrets of Naruto Mountain or having some kind of adventure there. Sasuke could also be there, perhaps on a mission related to the mountain. Sakura might be involved too, using her medical skills to help those in need during an event on the mountain.
Naruto is the central character as per the title. The old man of the mountain is another key character. Additionally, Iruka sensei might be included. He has always been important to Naruto's development. In this fanfiction, he could be the one who tells Naruto some old tales about the old man of the mountain, which sparks Naruto's interest in the first place. And there could be new characters created specifically for this fanfiction that are related to the old man of the mountain's world, like some sort of guardians or servants of the old man.
Naruto himself is often a common character. He might be either the one being interrogated or the one helping with the interrogation. Sasuke is also quite common. Given his complex past and the secrets he holds, he could be a prime target for interrogation. Kakashi is another one. His intelligence and experience make him a likely interrogator in many fanfictions.
Besides the main female characters from the original series, some fanfictions also include Tenten. She brings her weapon - master skills and a no - nonsense attitude to the harem. Another character that might show up is Temari. Her strong - willed and independent nature from the Sand Village can create interesting interactions within the harem. And then there's also Anko Mitarashi, who has her own unique charm and can be a wild card in the Naruto harem fanfiction.
Naruto is, of course, a very common character. He's often the central figure as his journey and growth are integral to most fanfictions. Sasuke is also frequently included. His complex relationship with Naruto can add depth to the story within the context of a coven. Sakura might be there too, perhaps as a healer or a member with her own unique skills in the coven.
Kakashi could be a common character in these fanfictions. He's Naruto's teacher and mentor, so when Naruto is hypnotized, he would likely be one of the first to try and figure out what's going on and how to reverse it. Additionally, characters like Shikamaru, with his high intelligence, might be involved in devising plans to deal with the hypnotized Naruto.
Kakashi can be a common character too. He might be the one who has to deal with Naruto's pranks and the chaos they cause in the village. Sometimes he might play along or use it as a teaching moment for Naruto. Also, the other members of Naruto's team, like Yamato, could be involved, either being pranked or helping Naruto plan his pranks.
Obviously Naruto himself is a central character. Then there are his friends like Sasuke and Sakura. Sasuke might be Naruto's second - in - command or a rival within the military structure. Sakura could be a medic on Naruto's team, providing essential medical support during battles.
Alma, Ennis's wife, is another character that shows up often in fanfiction. Her role as the woman caught in the middle of Ennis's conflicted feelings for Jack gives her a unique place in the story, and fanfiction can explore her side of the story more fully.
Often, Naruto himself in his 'dark' form is a central character. Hinata might be a part of the harem as she has strong feelings for Naruto in the original series. Sakura could also be included, perhaps with a different take on her relationship with Dark Naruto. And then there could be some original characters created specifically for the fanfiction to add more variety to the harem.
Obviously, Naruto himself is a common character as the big brother figure. Sasuke can also be a key character, perhaps as someone Naruto is trying to bring back into the fold or protect. Sakura might be there as a friend and fellow ninja who supports Naruto's big brotherly actions.