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.
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.
In this scenario, Sakura's character development would be complex. At first, she may be in a state of shock and denial. But as time passes, she would have to grow up fast. She would learn to manage her finances, her living situation, and her emotions all at once. Her relationships with her friends would also change. Some friends may be overly helpful while others may distance themselves. Through all this, Sakura would emerge as a more resilient and self - sufficient woman, ready to face any challenges that come her way for the sake of her child.
Sakura would probably be very hurt at first. She might cry a lot and feel betrayed. But then, she'd likely draw on her inner strength. She is a strong - willed character after all. She could focus on her work as a medical ninja to distract herself from the pain. And she would also have her friends to turn to for support, like Naruto who has always been there for her.
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.
One common theme is unrequited love. Often, Sakura has deep feelings for Sasuke which are shown through the symbol of sakura leaves. Another theme is redemption. The sakura leaves can represent new beginnings and Sasuke's journey towards redemption. For example, Sakura might use the beauty of the sakura leaves to remind Sasuke of the good in his life.
One possible reason could be Sasuke's pursuit of power. In many fanfictions, his thirst for greater strength might lead him to leave Sakura behind as he embarks on a solo journey to train in more dangerous and secluded places. He may feel that his goals are too dangerous for her to be involved with.
In many fanfictions, if Sakura were to be pregnant, it could be a very complex situation. If Naruto was the father, it would be a huge shift in their relationship dynamic. Naruto's carefree nature might change as he takes on the responsibility of fatherhood. He would be excited and probably vow to protect his new family with all his might. Sakura, on the other hand, would be a very protective mother, using her medical skills to ensure a healthy pregnancy.