In fanfiction, Sasuke's protectiveness of Naruto and Sakura can be shown in various ways. For example, he might use his Sharingan to sense any approaching danger towards them. This could lead to some really intense and action - packed scenes where Sasuke jumps in to defend them against powerful enemies.
One example could be a fanfiction where Naruto stands in front of Sasuke and Sakura when they are facing a powerful enemy. He uses his shadow clones to surround them and protect them from harm. Naruto's determination to keep them safe is unwavering, and he even taps into new forms of his chakra to fend off the threat.
In a fanfiction, Sasuke and Sakura might be protective of Naruto in a more emotional sense. For example, when Naruto is doubting himself due to some rumors in the village. Sakura would be the first to stand up for him, using her sharp tongue to put the rumor - spreaders in their place. And Sasuke, in his own quiet way, would show his support by training with Naruto extra hard, as if to remind him of his strength.
In fanfiction, Naruto's past experiences play a role in his protectiveness. He has lost so many people already, and he doesn't want Sasuke and Sakura to be added to that list. He has seen the pain that loss can bring, like when Sasuke left the village the first time. Naruto is also influenced by his ninja way. His sense of justice and loyalty drives him to protect those he cares about, which includes Sasuke and Sakura.
A plot point could be that Naruto is poisoned. Sasuke races to find the antidote, using his ninja skills to track down the source of the poison. Sakura stays by Naruto's side, using her medical ninjutsu to slow down the effects of the poison. Their combined efforts save Naruto in the end.
A common scenario is during battles. Sasuke, with his Sharingan and combat skills, will shield Sakura from enemy attacks. For instance, if they are facing a powerful enemy ninja, Sasuke would put himself in front of Sakura to take the brunt of the attack.
One common scenario is during battles. Naruto would be right by Sakura's side, deflecting attacks aimed at her. Another is when Sakura is facing emotional distress. Naruto would be there to comfort her and protect her from any further emotional harm.
There could be. Fanfiction allows for a wide range of interpretations and alternate storylines. But it's a really extreme and disturbing concept considering the bonds that Naruto, Sakura, and Sasuke share in the official story. It would be a very different take on the characters, and most fans who love the original story would probably find it hard to accept.
One popular type of fanfiction could be about their friendship. For example, a story might focus on a mission where Sasuke, Sakura and Naruto have to work together in a really difficult situation. They could use their individual skills, Naruto's brute strength and positive attitude, Sasuke's cool-headedness and powerful jutsu, and Sakura's medical knowledge and combat skills to overcome the odds.
Another way to discover these fanfictions is by joining Naruto - related fan communities on social media platforms such as Reddit or Tumblr. Fans often share and recommend their favorite fanfictions, and you're likely to come across some really good ones where Sasuke is protective of Sakura.