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.
One possibility is that Naruto finally gathers the courage to propose to Sakura in a very public and grand way. Maybe he takes her to the top of Hokage Rock, where they have a beautiful view of the village. He gives a heartfelt speech about how she has been by his side through so much, and how he can't imagine his future without her. Then he presents a ring that he's had made especially for her.
Sakura would be over the moon. She would blush deeply and look at Sasuke with so much love in her eyes. She might be at a loss for words for a moment, but then she would find her voice and tell Sasuke that she has been waiting for this moment her whole life. She would also feel a sense of pride that Sasuke has chosen her, after all they have been through. And she would immediately start thinking about how to share the good news with their friends, especially Naruto, who has been like a brother to her and has also been a part of their journey.
Maybe Sasuke has been secretly planning the proposal for a long time. He starts by taking Sakura on a journey to different places they've been to in their past adventures. Along the way, he drops little hints. When they reach a beautiful, secluded spot by a waterfall, he gets down on one knee. He tells Sakura that she is the only one who has truly understood him and that he wants to spend the rest of his life with her. Sakura is shocked but then hugs him tightly and accepts.
In the fanfiction, Ino might be initially shocked. She could have been seeing Naruto as just a friend for a long time. But then she might realize her true feelings for him and accept the proposal. This could lead to a big celebration in the Hidden Leaf Village, with all their friends and family being happy for them.
In a fanfiction, Naruto might plan a big public proposal. He could gather all their friends and family in the Hidden Leaf Village. He would make a big speech about how Hinata was the one who saw him when others didn't, and her love changed him. Then, with everyone watching, he would pop the question.
The plot might involve Sasuke finally understanding the true value of Sakura's love. He could plan an elaborate proposal. He might take her on a trip to all the places that were significant in their relationship, like the place where they first met as kids. And at the end of this journey, he proposes to her under a cherry blossom tree, which is symbolic of their relationship and also of Sakura herself.
The reaction from the villages would be quite interesting. In the Hidden Leaf, people would be excited. They would see it as a way to strengthen the bond with the Hidden Cloud. Kids would look up to Naruto even more. In the Hidden Cloud, the elders might have mixed feelings. They would be worried about losing Yugito's full focus on village matters. However, the younger ninjas in the Cloud would be thrilled and see it as a cool cross - village romance.
Well, if Naruto proposes to Yugito in a fanfiction, one possibility is that Yugito would be initially shocked. She might not have expected such a bold move from Naruto. After the initial surprise, she could accept his proposal with joy. This would then lead to a celebration in the Hidden Cloud Village. Their friends and families would come together, and it would be a big event filled with laughter, hugs, and lots of food.
Iruka sensei might also be involved. He has always been like a father figure to Naruto. He could give Naruto the confidence he needs and maybe even help him plan the location for the proposal, perhaps a place that has sentimental value for both Naruto and Hinata related to Naruto's early days at the academy.