Sakura's reaction would depend on how the author writes her character development. If she's become more confident in herself, she might approach Sasuke with a more assertive attitude. She could tell him that she's not the same girl he left behind. However, she'd still have that underlying love for him. She might also be worried about how the village will accept Sasuke's return and how it will affect her standing in Konoha. So her reaction would be a complex blend of personal feelings and concerns for the village.
Well, it could be about Sasuke coming back to Konoha and Sakura trying to re - establish their relationship. Maybe she's hesitant at first because of all the pain he's caused in the past.
One possible plot is that Sakura returns to Konoha to reunite with her friends. She has been away for a while and during that time, things have changed in the village. She has to readjust to the new Konoha while also dealing with her own personal growth and the relationships she left behind.
One possible fanfiction could be that Sasuke returns to Konoha after a long mission. Sakura, who has been longing for his return, discovers she is pregnant. This news brings a mix of joy and worry. The village of Konoha is also excited as it means a new generation is coming. Sasuke might initially be shocked but then becomes determined to protect his family and the village.
Obviously Sakura herself is the most important character. Naruto and Sasuke would also be important as they are her friends and comrades. Kakashi could also play a role, maybe as a mentor or someone who gives her advice on how to readjust to Konoha life.
Sasuke might initially be shocked. He has always seen Sakura as someone connected to Konoha, so her leaving would be unexpected. He could be concerned about her safety, especially if she leaves without proper preparation or protection.
His understanding of relationships might grow. Through his interactions with Sakura, Sasuke could learn about compromise, forgiveness, and unconditional love. For example, he might learn to forgive himself for his past mistakes and understand that Sakura loves him despite all that.
One reason could be to seek a new life away from the constraints of Konoha. Maybe they feel that they can't fully grow or explore their potential within the village. Another reason might be to protect Konoha in their own way. They could believe that leaving and dealing with threats from the outside would keep the village safer.
In the context of Konoha High School, their rivalry could extend to popularity. Sasuke is the cool, brooding type that many students admire from afar. Sakura is popular among the girls for her intelligence and kindness. They both unconsciously compete for the most 'liked' status in school, which creates interesting situations and interactions between them.
One possible plot could be Sasuke returning to Sakura after a long and dangerous mission. He realizes how much he has missed her and they start to rebuild their relationship. They might go on dates and do simple things like having dinner together or taking walks in the village.