In the 'yugi turns into a girl fanfiction', apart from Yugi's main group of friends, there could be some new characters introduced. Maybe a mysterious figure who knows the secret behind the transformation and can either help or hinder Yugi. Also, Yugi's grandfather might play an important role. He could be worried about his grandson/granddaughter and try to find a solution to reverse the transformation. And of course, the spirit of the Millennium Puzzle, Yami Yugi, would also be involved, perhaps having a different kind of connection with Yugi in this new form.
Well, in this type of fanfiction, the main characters are surely Yugi and his friends. But we might also see some of the other duelists getting involved. For instance, Kaiba might initially be dismissive of Yugi's new form but later come to respect her skills in the card game. And then there could be some minor characters from the card - game tournaments who react in various ways to Yugi's transformation. Some might be jealous, some might be curious, and some might even be inspired by her new - found confidence in the game.
Obviously, Naruto himself is the main character in this situation. His friends like Sasuke and Sakura are very likely to be involved. They would be the ones taking care of him, trying to figure out how to turn him back to normal. Kakashi Sensei would also probably be there, guiding them and trying to keep Naruto safe.
Obviously Naruto himself is the central character. Sasuke would also likely be involved. Given their history and Sasuke's own complex relationship with Konoha, he might side with Naruto or at least be a key figure in the events. Kakashi too, as he has been Naruto's teacher and is an important figure in Konoha. He could be caught in the middle, trying to understand Naruto's motives and also trying to uphold Konoha's stability.
Obviously, Ash and Erica would be the main characters. Ash is the one who undergoes the transformation, so he's central to the story. Erica is the one who causes the change, so she also plays a crucial role.
Obviously Naruto himself, as he is the one turning into the Nine - Tailed Fox. Sasuke would also likely be involved. He might be the one to try and reach Naruto when he is in his fox - form, either to fight him or to bring him back. Sakura too, she could use her medical ninjutsu to try and help Naruto if he gets injured during the transformation.
Among the students, Hermione Granger - if we consider a scenario where this fanfiction has some sort of time - travel or alternate universe aspect - could interact with Severus. Hermione would be curious about Severus as a girl and might try to learn from her knowledge of potions. And Severus, in turn, could be both annoyed and impressed by Hermione's eagerness and intelligence.
The main characters are Yugi and Yusaku. Yugi is a character with a long history in the Duel Monsters universe. He has a group of friends and has faced many challenges. Yusaku, on the other hand, is more of a loner who uses his hacking skills in dueling. In the fanfiction, they will be the central focus as their paths cross and they interact with each other. Their different personalities and dueling styles will drive the story forward, whether they become friends, rivals, or a combination of both.
Well, of course, the transformed Spider Man as a girl is the central character. But often, his friends like Ned and MJ are still important characters. They might have different reactions to his transformation. Ned could be initially shocked but then super supportive, while MJ might offer some practical advice on how to handle the new situation.
Well, one possible plot could be that Yugi turns into a girl due to a magical spell gone wrong. Then he/she has to deal with the new identity while still being involved in his usual card games. Maybe the other characters are initially shocked but then gradually accept the new Yugi.
In addition to the obvious ones like Naruto and Sakura, other characters from Sasuke's clan might interact with him. For instance, if there are any remaining Uchiha members, they might have mixed reactions. Some could be shocked and try to figure out what happened, while others might be more accepting. Also, characters like Shikamaru, who is very observant, would surely notice the change in Sasuke and might have some unique interactions, perhaps trying to figure out how this change could affect their team dynamics or the overall situation in the village.
Luna could also be part of the story. She might be an eccentric aunt - like figure to Hermione's children, introducing them to her unique view of the wizarding world and strange magical creatures. Professor McGonagall could be a mentor figure for Hermione in her role as a mother, offering wisdom and guidance on how to raise magical children.