Sasuke would likely be a bit stunned at first. He's a complex character. But then he would become very protective. He has lost so much in his life, and he wouldn't want to lose Sakura or the baby. He might become more vigilant and even cut back on some of his more dangerous missions.
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.
Well, in these fanfictions, Sasuke's jealousy can be quite intense. It can be seen when he gets angry or distant when another male character is around Sakura. For example, if a male teammate gets too friendly with Sakura, Sasuke may start to give him the cold shoulder. It's a way to show that Sasuke has deep feelings for Sakura and doesn't like the idea of someone else getting close to her.
One example could be when another character shows too much interest in Sakura. Sasuke might become jealous. For instance, if a new ninja in the village starts flirting with Sakura, Sasuke would feel a twinge of jealousy. He might not show it outwardly at first, but his actions would change. He could start being more protective of Sakura, like walking her home more often or making sure he's around when that other character is there.
In sasusaku mafia fanfiction, Sasuke often starts as a cold and calculating mafia figure. As the story progresses, his interactions with Sakura can soften him. For example, in some stories, he might initially see Sakura as a liability but later realizes her strength and importance, which changes his view of relationships and makes him more empathetic.
One popular Sasusaku dark Sasuke fanfiction is 'The Darkened Bond'. It delves deep into Sasuke's inner darkness and how it affects his relationship with Sakura. In this fic, Sasuke struggles with his demons while still having a complex and intense connection with Sakura.
Their characters are also developed through their interactions with each other. For example, when they face a difficult situation together, like an attack on the village. Sasuke's combat skills combined with Sakura's medical knowledge create a strong partnership. This not only shows their growth as individuals but also how well they complement each other in the relationship.
Sasuke might be in shock at first. He can't believe that Naruto is dying in his arms. He may feel a great sense of guilt, thinking that he could have done more to prevent it.
In general, a teacher - student relationship in fanfiction can be a complex and often controversial topic. For Sasuke and Sakura, it goes against their established dynamic in the original series. Their relationship in the Naruto series is more of comrades and later romantic partners on an equal footing. So, from a purist perspective of their characters, such a 'teacher - student' setup in lemon fanfiction might not be appropriate as it distorts their true relationship.
She might be initially heartbroken. Sakura, being in love with Sasuke, would surely be deeply affected when he neglects her. She could become withdrawn herself, losing some of her usual cheerfulness.