Naruto would be devastated. He has always considered Sakura as a dear friend and teammate. He would probably try to convince her to come back at first. If that fails, he might see it as his mission to bring her back by force if necessary, believing that she has been led astray. Sasuke, on the other hand, might have a more complex reaction. He has his own issues with Konoha, so he might understand Sakura's desire to leave on some level, but he would also be suspicious of her motives for joining Akatsuki.
In terms of her character development, Sakura would likely become more of an anti - hero. She would be in a morally grey area. On one hand, she is with a group that is seen as villains by most of the ninja world. On the other hand, she might still have her own reasons for joining, like seeking power to protect something or someone. This new path could make her more independent and force her to rely on her own skills and judgment rather than depending on the support system she had in Konoha.
Well, one possibility is that Naruto would face a lot of distrust in Iwa at first. He's from Konoha, after all, which has had a history of conflict with Iwa. But Naruto being Naruto, he might gradually win over some of the Iwa ninjas with his determination and unique skills. He could learn new jutsus specific to Iwa's style of fighting, which would make him an even more formidable ninja.
In the long run, the relationship could be mended if Naruto is able to show that his move to Suna has been beneficial not only to him but also to both villages. His friends might start to see his actions in a new light. They could collaborate on certain projects or missions that involve both Konoha and Suna. However, there would always be a sense of loss and change in their relationship. Naruto's departure would be a significant turning point, and they would have to re - evaluate their friendship in the context of the new situation where Naruto is now part of Suna.
With his family - like figures in Konoha, such as Iruka, the relationship would be put to the test. Iruka would probably be heartbroken but also hope that Naruto is doing what he thinks is right. In Iwa, Naruto might find a new mentor - like figure who could teach him different things compared to what he learned in Konoha. This new relationship could shape his ninja path in a whole new way.
His relationships would become very complex. His friends in Konoha would be in shock. Naruto leaving Konoha for Kumo is like a slap in the face to them. They would wonder what drove him to such a decision. For example, Naruto had such a strong bond with Iruka - his first mentor. Iruka would be deeply saddened and would question if he had failed Naruto in some way. And Naruto's relationship with Kakashi would also take a hit. Kakashi would be worried about what this means for the future and how it could potentially lead to conflict between Konoha and Kumo.
Naruto might leave Konoha for Suna because he sees Suna as a place where he can make a real change on a larger scale. Konoha is a well - established village with its own ways, and it might be difficult for Naruto to implement his ideas fully. In Suna, which may be in a more desperate or rebuilding state, he could have more influence. Additionally, if there are personal vendettas against him in Konoha that he can't resolve, he may choose to flee to Suna to escape the hostility and find a new purpose.
Naruto could use his shadow clone jutsu to play pranks. For instance, he could make clones that look like the Akatsuki members themselves and have them do really silly things like dance around in circles or sing out - of - tune. The real Akatsuki members would be really confused at first, thinking one of their comrades has gone crazy.
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.
One possibility is that Naruto joins Akatsuki to change it from within. He might think he can stop their more evil plans while also learning more about his own powers and the secrets of the ninja world that Akatsuki seems to be involved in.