Belphegor would be his usual unpredictable self. He might play pranks on Fem Tsuna at first to see how she reacts. But if she shows that she can handle his antics and has some interesting skills or secrets, he could end up being one of her closest allies within the Varia. Overall, the reactions of the Varia members would be a mix of suspicion, intrigue, and potential acceptance depending on how Fem Tsuna presents herself.
Well, the plot could involve Fem Tsuna bringing a new dynamic to the Varia. Maybe she has unique skills that the Varia lack. For example, she could have a special type of flame that is different from what they usually deal with. This would make the Varia members curious about her and her abilities. And she might start off as an outsider trying to prove herself worthy of being in their group.
If Harry joins the Varia in fanfiction, his character would undergo a substantial transformation. His moral compass might be adjusted as he is exposed to the Varia's different ethical code. He might become more ruthless in combat situations, as the Varia are not as restrained as the wizarding world in terms of using force. His relationships would also change. He would no longer be surrounded by his Hogwarts friends, but by a group of tough - minded individuals. This would force him to communicate and interact in new ways. His identity would shift from being mainly a wizard from Hogwarts to being a member of the Varia, which would influence his self - perception and how he presents himself to the world.
The younger ninjas in Suna would be excited. Naruto is a well - known and powerful ninja. They would look up to him and want to train with him. The elders in Suna might be a bit more cautious at first. But once they see the benefits Naruto can bring, like better relations with Konoha and new ninja techniques, they would start to accept him. Overall, there would be a mix of excitement, caution, and anticipation in Suna.
Well, he might learn a whole new set of combat skills. The Varia are known for their tough and unique fighting styles. Harry could become even more formidable in battle. Maybe he'd also have to adapt to their strict code of conduct, which would be a big change from Hogwarts.
The Weasley family would be heartbroken. Molly would probably cry for days, seeing Harry as one of her own. Ginny, who had a crush on Harry, would be confused and hurt. She would try to talk to Harry and convince him to come back to the right side. Hagrid would be in disbelief. He had always been there for Harry and would find it hard to accept that Harry had joined Voldemort. He might even try to go after Harry on his own, without thinking of the consequences, just to bring him back to Hogwarts.
The Hogwarts students would be divided. Some would be in disbelief and would still hope that Harry has a good reason for joining. They might secretly support him. Others, especially those who have lost family members to the Death Eaters, would be furious and see Harry as a traitor. Harry's old enemies at Hogwarts, like Draco Malfoy, would also be confused. Draco might initially think that Harry has finally seen the 'right' side, but as he realizes Harry's true intentions (if they are good), he would be conflicted as well since he's been brought up in a Death Eater - influenced family.
The other characters would be shocked. Weiss would probably be the first to try and figure out what's wrong with Ruby. Blake would be worried about Ruby losing her way, and Yang would be furious. Yang might even go on a solo mission to bring Ruby back, not fully trusting the rest of the team to handle it delicately. The rest of the characters like Jaune and Nora would also be in disbelief and would start planning ways to rescue Ruby.
The villagers' reaction would be mixed. Some would be in awe of Fem Kyuubi's power and her act of saving Naruto. They would see her as a hero and start to change their views on the Kyuubi in general. However, there would also be those who are still fearful. They might think that Fem Kyuubi has some ulterior motives and be suspicious of her. Naruto's friends from his ninja team, like Shikamaru and Choji, would probably be more accepting. They would welcome Fem Kyuubi as long as she proves to be on Naruto's side and doesn't cause any trouble for the village.
Hermione would be very suspicious of fem Sauron right away. She'd start researching any possible lore or magic related to her. Ron would probably be a bit more hesitant and scared, but still stand by Harry. Harry himself would be on high alert, his instincts telling him that fem Sauron is a great danger. Dumbledore might try to approach her with caution, seeing if there's any chance of redeeming her, but also preparing for the worst.
The Order of the Phoenix would see Harry's joining of the Death Eaters as a major setback. They would likely view it as a sign that Voldemort has become even more powerful. Dumbledore, if he were still alive, would be very concerned and would try to understand what led Harry to this decision. He would also be devising a plan to get Harry out of the clutches of the Death Eaters.