The other villages would become very cautious. If Dark Naruto is capable of killing Sasuke, a very powerful shinobi, it means he's a huge threat. They might start to form alliances against Konoha, fearing that Dark Naruto's actions are a sign of Konoha losing control. This could lead to a new era of war and conflict in the Naruto world. Also, Kakashi, who was both Naruto and Sasuke's teacher, would be deeply affected. He might blame himself for not being able to prevent this tragedy.
The village of Konoha would be in chaos. Naruto was seen as a hero, and if his dark side kills Sasuke, it would shatter the trust of many. His friends like Sakura would be devastated. She might go on a revenge quest against Dark Naruto. The Uchiha clan, which Sasuke was part of, would also be in turmoil. They might see this as an act of aggression against their clan and seek justice.
The village of Konoha would be in shock. Naruto is seen as a hero, but killing Sasuke, who was also a powerful and well - known ninja, would be a very controversial act. Some might support Naruto, believing he had no other choice for the greater good. Others would be angry and might even turn against him, thinking he could have found another way.
Sakura would be devastated. She has always had deep feelings for Sasuke. She might initially be angry with Naruto, thinking that there could have been another way. But later, she might understand Naruto's difficult decision when she realizes the threat Sasuke posed.
At first, Sasuke might not believe it was Naruto's own will. He would try to find out if Naruto was under some sort of external influence. But if he found out that Naruto was fully responsible, Sasuke's reaction would be one of pure hatred. He would abandon all his previous beliefs and goals and make it his sole mission to destroy Naruto. He might also cut off all ties with the village that Naruto was protecting, seeing it as an accomplice in his sister's death.
Many of Naruto's friends and allies would be filled with rage. Characters like Sasuke would probably seek immediate revenge on Kawaki. The other villages might also see this as a sign of instability in the Hidden Leaf and could either try to take advantage or offer help depending on their relationships with the Leaf. And the younger generation, like Boruto, would be deeply affected. He would have to deal with the loss of his father and might struggle with his own identity and purpose in a world without Naruto.
The villagers would likely be in shock. Naruto is a beloved figure, but killing his own son would be a very controversial act. Some might turn against Naruto, believing he has gone too far. Others might understand his reasons if they knew the full story, but still struggle with the morality of it.
Naruto would probably be very confused at first. He trusts Sasuke, even if it's a Fem Sasuke in this fanfiction, and he wouldn't expect to be kidnapped by her. So, his initial reaction might be to try and talk to her, asking her why she's doing this.
Some villagers might be shocked and horrified. Naruto has always been seen as a hero, and this act of killing the council would shatter that image for many. They would fear that Naruto has gone rogue and might pose a threat to them.
Sasuke would be furious. He's always been protective of Naruto in his own way. He would immediately start looking for her, using all his skills and resources. He might even go on a rampage if he thought Naruto was in serious danger.
The reaction would be one of shock. Naruto is a well - known figure in the ninja world, and many see him as a symbol of hope. His friends like Sakura and Sasuke would be devastated. Sakura, who has known Naruto for a long time, would likely be in disbelief and filled with anger towards Tsunade. Sasuke, depending on his state in the fanfic, might seek revenge.
Sakura might be initially shocked as killing is a serious matter, but then she would understand Naruto's reasons if she saw the cruelty of the Celestial Dragons. She would support him in the end. Kakashi, on the other hand, would probably be more analytical. He would first assess if Naruto's actions were truly necessary and if there were any other ways to deal with the situation. But once he realizes the nature of the Celestial Dragons, he would back Naruto up.