The older generation like Tsunade would be filled with grief. She saw Naruto as the future of the village and his death would be a major setback for her plans. Jiraiya, if he were still alive in this fanfiction, would be extremely proud of Naruto's self - sacrifice but also deeply saddened. He might go on a journey to find a way to bring Naruto back, using all his knowledge and connections. The villagers themselves would be in mourning. Naruto was their hero, and his death would leave a void that would be hard to fill. They would look to the remaining strong ninjas to protect them and carry on Naruto's legacy.
Sasuke would be devastated. He and Naruto had a complex relationship, and despite their differences, they were like brothers. His reaction might be to isolate himself at first, blaming himself for not being there to protect Naruto. Sakura would be heartbroken. She had deep feelings for Naruto, and his death would be a huge blow. She might become more determined to protect the village in his memory. Kakashi would feel like he failed as a teacher. He always saw Naruto's potential and to lose him would be a great loss for him.
In such a fanfiction, perhaps there would be a spiritual journey for Naruto. As he's dying while sealing the Kyuubi, he could have visions of his past, his friends, and his dreams. He might see the faces of Iruka - sensei who first recognized him, or Hinata's loving looks. This could give him the strength to complete the sealing process. After his death, the village could start to remember and celebrate his life in different ways. Statues could be erected in his honor, and his story could be told to every new ninja trainee as a legend of self - sacrifice.
Sasuke's reaction would be the most complex. He would be filled with guilt for causing Naruto's death. He would also feel a new sense of purpose, to live up to Naruto's sacrifice. Sasuke might become more withdrawn at first, dealing with the enormity of what has happened. The other ninja from Naruto's generation, like Shikamaru, would be sad but also respect Naruto's choice. They would support Sasuke in his new path, as they understand it was what Naruto wanted. And the younger generation would see Naruto as a martyr, someone who sacrificed for a greater good.
The older generation, like Tsunade, would be horrified. They've seen Konoha through many hardships and would not want to see it destroyed. They would likely mobilize all available forces to stop Naruto and the Kyuubi. Meanwhile, Naruto's friends like Shikamaru and Choji would be in shock. They've always known Naruto as a kind - hearted and loyal friend, and this sudden turn would be very difficult for them to accept. They might initially be in denial and then try to find a way to stop Naruto without harming him.
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.
Naruto would likely be extremely confused at first. He has always idolized his father, and to have Minato do such a thing would shatter his perception. He'd probably try to talk to Minato, ask him why he's doing it.
He might be initially confused. Naruto is used to dealing with all kinds of opponents and situations, but a yandere Kyuubi would be a new and strange thing for him. He could try to reason with her at first.
He might also try to reason with her. Naruto has a big heart and he would likely want to understand her feelings. He could say things like 'We're friends, we don't need to be this way.' He'd try to get her to see that her possessiveness is not healthy for either of them.
Naruto might initially be shocked and angry. He has always considered the Kyuubi as an enemy within him, and now being kidnapped by it is the worst - case scenario for him. He could try to fight back immediately, using whatever little chakra he can muster without relying on the Kyuubi's power.
Tsunade could be impressed by the power of the Kyuubi suit. Given her own strength, she would appreciate the additional boost it gives Naruto. She might even see it as a valuable asset in protecting the village and start to develop strategies around how Naruto can best use the suit in combat situations.
If Naruto was an Ajin in a fanfiction, the characters in Naruto would have a mix of reactions. Hinata would be concerned for Naruto's well - being. She might be a bit scared at first because of his new and strange abilities, but still stand by him. The villagers, who have had a rocky relationship with Naruto in the past, might be afraid of him all over again. They could see his Ajin powers as a threat. On the other hand, Naruto's close friends like Shikamaru would try to understand what's going on and help Naruto control his powers if they can.