Hinata would be heartbroken at first. Naruto is someone she deeply cares about. But she's also a strong - willed ninja. So she might start by trying to understand why Naruto left. She could look for clues in the village or talk to Naruto's friends to figure out his possible destination.
She might initially be in shock. However, Hinata's love for Naruto would drive her to take action. She could go to Naruto's favorite places in Konoha, like the ramen stand, hoping to find some sign of where he went. And she would probably start preparing herself for a journey to find him. She would gather supplies and train extra hard to make sure she can protect herself on the way.
Hinata's reaction would be complex. On one hand, she's used to Naruto being a bit of a free spirit. But leaving Konoha is a big deal. She would be worried about his safety. She might try to convince the Hokage or other village leaders to let her go after him. And all the while, she would be thinking about how much she misses him and how she wants to be by his side, no matter what he's going through.
Hinata would likely go to great lengths to save Naruto. She might seek help from the most powerful medical ninjas in the village or even venture out to find a rare herb or a mysterious healer. She would be in a state of shock at first, but then her love for Naruto would drive her to take action.
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.
In some fanfictions, Naruto is completely oblivious at first. He doesn't understand why Hinata is acting strange. He just goes about his day, being friendly as usual. But as Hinata's jealousy becomes more obvious, he might start to notice that something is wrong. He could be confused and try to ask Hinata what's bothering her.
Well, initially, there would be chaos in the village. People would start to spread rumors about why Naruto left. His closest friends like Sakura and Kakashi would be devastated. They would try to figure out where he went and why. The Hokage at the time would have to make a decision. They could either try to convince Naruto to come back through peaceful means or prepare for the worst - case scenario if Naruto turned against the village. The village as a whole would have to face the fact that one of their most prominent members left, and it would have an impact on their reputation among other villages as well.
Some in the village would be sad to see them go. Naruto is a hero to many, and Hinata is also well - liked. People like Iruka would miss Naruto a great deal. But others might understand their need for a new life away from the village and support their decision.
Some might be in shock. Naruto, regardless of being male or female in this fanfiction, has been a significant part of the village. People who have come to know her would be surprised that she would leave. They might start to question if there was something they could have done to prevent it.
Well, one possibility is that Hinata decides to go after Naruto. She's in love with him, after all. She might leave Konoha too, in search of him. This could lead to a whole adventure where they meet new characters and face new challenges together. It would also be a chance for their relationship to develop further outside the constraints of the village.
Sasuke might be more understanding. Given his own experiences of leaving Konoha, he could respect Naruto's decision. However, he might also secretly plan to keep an eye on Naruto from afar to make sure he is safe.
Konoha would initially be in shock. Naruto is a hero to many in the village, and his sudden departure with Itachi, who was once considered a traitor, would cause a lot of unrest. The villagers might start to question the leadership of the village, wondering why Naruto left and if there was something they could have done to prevent it.
Naruto would probably be shocked at first. He might not have expected Hinata to leave him for Kiba. He could be angry at himself for not noticing Hinata's unhappiness sooner.