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.
Naruto would likely be initially shocked. He has always considered the Kyubii as a part of him and a friend in some ways. So the betrayal would be a huge blow to his sense of trust.
Naruto would probably be initially shocked and on guard. He's used to all kinds of strange things in his world, but a Fem Predator would be something entirely new. He might try to talk to her first, asking who she is and what she wants. If she showed any signs of aggression, he'd be ready to fight, using his Rasengan or other jutsu. But if she seemed peaceful, Naruto would be curious and want to learn more about her, maybe even offer her some ramen to break the ice.
Naruto might initially be shocked. Given his friendly nature towards Sasuke in the original story, he wouldn't expect such an attack from her. So, his first reaction could be pure disbelief.
The ninja elders in Konoha could see it as a potential threat. They might worry that Fem Naruto leaving could expose Konoha's secrets or that she could be turned against the village by enemies. So, they would start to take measures to protect Konoha's interests. They could send out spies to keep an eye on her or try to find a way to bring her back. On the other hand, the younger generation of ninjas might be inspired by her courage to break free and seek their own paths outside of the village.
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.
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 be initially confused. He is used to being friendly with everyone, and this sudden possessiveness from Fem Gaara could catch him off - guard. So he may just try to talk to her to understand why she is acting this way.
She would probably be very angry at first. Naruto is a headstrong character, and being kidnapped against her will would make her furious. She'd likely try to fight back immediately, using whatever skills she has at her disposal.
Naruto would probably be very confused at first. He's always seen the Akatsuki as the enemy, so being taken there by Fem Itachi would be quite a shock. He might be on guard and constantly looking for a way to escape.