The other characters' reactions would be diverse. Shikamaru might think it's a pain but also find it interesting. He would be observant of how their relationship affects their ninja duties. Hinata might be a bit sad at first because she used to have feelings for Naruto, but she would also be kind and supportive. The kids in the village would look up to Naruto and Sakura's relationship and see them as a model couple.
Sasuke would probably be a bit surprised at first. He has his own complex relationship with both Naruto and Sakura. But he would likely respect their relationship in the end. Kakashi would be supportive, he has seen Naruto and Sakura grow up and would be happy for them. The other villagers would also be happy as Naruto is a hero to them, and seeing him happy with Sakura would be a positive thing.
The other members of Team 7 like Sai would be confused. Sai doesn't fully understand emotions like the others, but he would know that this is a bad situation. He would follow Sasuke and Kakashi's lead in trying to find Naruto and Sakura. Tsunade, as the Hokage, would have to make some tough decisions. She would probably send out search parties while also trying to keep the situation under wraps to prevent panic in the village. The other ninja in Konoha would be on high alert. They would be worried that Naruto's actions could be the start of a larger threat, either from within the village or from outside forces.
Sasuke would likely be filled with rage. He and Naruto had a complex relationship, and Naruto's death at Sakura's hands would make Sasuke seek revenge or at least demand answers. Kakashi, on the other hand, would be deeply saddened. He was Naruto's teacher and would probably feel a sense of failure.
Their relationship might make Sasuke a bit jealous at first. Since Sasuke has his own complex relationship with both Naruto and Sakura. But eventually, he could come to accept it. For their other friends like Kakashi, he would probably be supportive and give them some relationship advice based on his own experiences. Shikamaru might find it a bit of a nuisance at first, thinking it could disrupt the team dynamics, but then see how happy they are and be okay with it.
Sakura might be completely shocked at first. She might freeze for a moment, not believing what's happening. Then she could start crying tears of joy and say yes immediately.
The older generation of shinobi like Tsunade would be both proud and a bit worried. Proud because it's a new step for the village but worried about the potential challenges that Sakura and Naruto would face. She might offer her medical expertise to ensure a healthy pregnancy. Shikamaru would probably be the voice of reason among Naruto's friends. He would help them think through all the practical aspects of having a baby, like housing, finances, and how it would affect their ninja duties.
Sasuke would likely be very surprised and perhaps a bit angry. He has his own complex relationship with Sakura, and seeing Naruto kiss her, even accidentally, would stir up his emotions. He might give Naruto a cold stare or a warning. Kakashi, on the other hand, would probably just raise an eyebrow and make a dry comment about how troublesome the situation is. He might also use this as an opportunity to teach them about self - control and the importance of respecting personal boundaries.
Sakura may react with a sense of urgency. She would drop whatever she was doing and rush to Naruto's side. She'd be worried that something truly terrible has happened. If Naruto is hesitant to talk, Sakura might just sit quietly with him, waiting for him to open up. This would show her patience and understanding, and also how much she values Naruto as a friend.
Sakura would be devastated. She would probably blame herself for Naruto's death since he died protecting her. She might go into a state of deep depression at first, withdrawing from everyone.
Naruto would be deeply saddened. He has always hoped for Sasuke and Sakura to be happy together. He might initially try to mediate and get them to work things out, believing that their relationship can be salvaged. He would remind them of the good times and how much they mean to each other.
Naruto might also try to remember Sakura in a positive way. He would cherish the memories they had together. He could start initiatives in the village in her name, like promoting medical ninja training more, since Sakura was a great medical ninja. He would slowly turn his grief into a force for good in the village.