First of all, Naruto and Sasuke's relationship would take a hit. They have this intense connection in the original story, and this sudden act by Naruto would make Sasuke feel like Naruto has abandoned their relationship. For Ino, she would be thrown into a new situation. She may have had her eyes on Sasuke before, but now Naruto has kissed her. This could make her reevaluate her feelings for both of them. As for the other characters, they would be shocked. Shikamaru might be especially intrigued as he's a close friend of Ino. He would probably try to figure out what's going on in Naruto and Ino's heads, and this could also create new interactions and relationships among the group.
Well, it could lead to a huge rift between Naruto and Sasuke. Sasuke might feel betrayed in a sense, thinking Naruto has shifted his focus from their deep bond. Ino, on the other hand, would be in a state of shock at first but then might start to develop real feelings for Naruto. This could also change the whole dynamic within the Konoha ninja group, with friends and comrades having mixed reactions to this unexpected turn of events.
For Hinata, it would be a dream come true. Her relationship with Naruto would take a huge step forward. She would likely be overjoyed and more confident. Naruto, on the other hand, might face some mixed reactions from his friends. Some might be surprised but supportive, while others might question this sudden shift. Sasuke would probably be a bit confused at first. His relationship with Naruto has always been unique, and this change could make him wonder about his place in Naruto's life.
Sakura would be extremely affected. Instead of constantly worrying about Sasuke leaving, she'd be focused on Naruto. She might feel guilty that Naruto left because of Sasuke. Her relationship with Sasuke would also change as she might blame him in some way for Naruto's departure.
With their friends, Naruto in Ino's body would have to deal with Ino's female friends. He might not be as good at handling their gossip and girl - talk as Ino is. Ino in Naruto's body, on the other hand, would have to interact with Naruto's male friends. His more straightforward and bold attitude could either amuse or annoy them. This could lead to some re - evaluations of their friendships.
Well, their relationship with Kakashi would be different. Instead of just being their teacher, he might see them more as a family unit. He would have to deal with their sibling dynamics, like Naruto and Sasuke's competitiveness and Sakura trying to keep the peace between them.
If the roles were reversed, Sasuke would be the one that Hinata might have a secret crush on. Since he would be the more outgoing and friendly one. And Sasuke would probably be more involved with the village kids, mentoring them like Naruto did. Naruto, as Sasuke, would have a more strained relationship with the Hokage. The Hokage might be constantly worried about Naruto's motives and actions. His relationship with Jiraiya would also change. Jiraiya might be more cautious around Naruto, instead of the carefree mentorship they had in the original story.
His relationship with Sakura would be very different. Instead of the cold Sasuke she knew, she would now be faced with Naruto's personality in Sasuke's body. This could lead to a more positive and friendly relationship. His bond with Kakashi might also change as Naruto's more open and sometimes brash nature would contrast with Sasuke's more reserved self. Kakashi might be both surprised and intrigued.
Well, in fanfiction, the author might want to explore a different romantic dynamic. Naruto and Sasuke have a very intense friendship, but by having Naruto kiss Hinata instead, it could be to show a more traditional romantic storyline. Maybe the author thinks that Hinata's gentle and loving nature is a better match for Naruto in a romantic sense compared to his complex relationship with Sasuke.
Naruto and Sasuke's relationship would likely become more stable. They would have to put aside their old rivalries for the sake of the 'family'. They might start to see each other as brothers - in - law in a sense. Sakura would be the bridge between them, her love for both of them in different ways helping to ease any remaining tensions. Naruto would probably become more protective of Sasuke, and Sasuke would be more open to Naruto's friendship.
Well, Ginny would be devastated. Her relationship with Harry was budding into something more. With Harry gone, she might become more withdrawn. Sirius would feel a sense of guilt towards Ginny, as he's alive instead of Harry. He might try to be there for her like an older brother. The Weasley family as a whole would be in mourning. Their relationship with Sirius would be a mix of gratitude for still being there but also sadness that Harry was gone. And Snape's feelings would be complex. He might feel a strange sense of loss, as Harry was his connection to Lily in a way, and now he has to deal with Sirius still being alive.