In some fanfictions, Sasuke may not seem affected at all at first. He might continue on his path as if Sakura was never there. But as time passes, he could start to notice the void she left. Little things that she used to do for him or with him, like bringing him medical supplies or just being there to listen, are no longer there. This could gradually eat away at him and cause him to have a slow but significant character shift.
Sasuke might become more isolated. Without Sakura's presence, he could sink deeper into his brooding and revenge - seeking state. He may start to question if he has truly lost something valuable, which could either harden his resolve further or make him more self - reflective in a negative way.
If Sasuke is a cold - hearted character at the start, seeing Sakura kiss someone might make him more empathetic. He might start to understand the complexity of human emotions better. For example, he could feel jealousy for the first time, which would be a new emotion for him to grapple with and could lead to his character evolving in terms of emotional depth.
It can slow down the relationship development at first. Sasuke's possessiveness might make Sakura feel a bit smothered. She may not like being constantly guarded or having Sasuke interfere in her friendships. However, as they grow older, it could also strengthen their bond. Sakura might come to realize that Sasuke's possessiveness is a sign of his deep care for her.
In some fanfictions, Sakura may be determined to find Sasuke and bring him back. She could set out on her own journey, facing various challenges along the way, and growing both as a person and as a ninja in the process of trying to reunite with him.
Naruto might initially be in denial. He's so used to having Sakura around and believing that they have a future together. So when she leaves for Sasuke, he might think it's just a temporary thing or that she's been influenced by something or someone. But as time passes and he realizes it's real, he would be deeply hurt. He might also start to question his own self - worth, thinking that he wasn't good enough for Sakura. And he might even try to win her back at first, but then slowly come to accept the situation and focus on his other responsibilities like being a ninja and protecting the village.
She may initially be angry. Sakura is a proud and strong character. She could confront Sasuke and Ino, demanding an explanation. After that, she might decide to become even stronger, both in her ninja skills and her emotional resilience, to show Sasuke what he's missing.
Sakura might be heartbroken. She's been in love with Sasuke for so long. She could initially go into denial, thinking it's just a temporary thing. Then she might get angry and vow to prove herself to Sasuke, perhaps by becoming an even stronger ninja.
She could be heartbroken. Sakura has always loved Sasuke deeply, so his leaving for Naruto would be a huge blow to her. She might initially be in denial, not believing that Sasuke would choose Naruto over her.
Sasuke might become more protective. Since Sakura is a princess, he feels a stronger sense of duty to keep her safe, which changes his usually aloof demeanor.
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.
However, in the long run, this yelling incident could be a turning point. If they both later reflect on it, they might come to a better understanding of each other. Sakura might learn to approach Sasuke in a different way, and Sasuke might start to value Sakura's opinions more. So overall, it has the potential to significantly change the dynamic of their relationship in the fanfiction.