The first key element is Naruto's understanding of Sasuke. He knows Sasuke's past, his pain, and his motives. This understanding allows him to approach Sasuke in a way that can reach him. Second, the role of the ninja world around them. The village's values, the other characters' opinions, all can influence Sasuke's journey. For instance, if the village shows forgiveness and acceptance, it can be a factor in pulling Sasuke back from the dark. And finally, the internal struggle within Sasuke. There's the part of him that wants to be saved by Naruto and the part that is consumed by darkness, and this struggle is central to the fanfiction.
Well, in the fanfiction, Naruto could save Ino from Sasuke by appealing to Sasuke's former friendship. Naruto might talk to Sasuke, reminding him of their days in Team 7 and how Ino is also their comrade, which makes Sasuke change his mind and let Ino go.
Simple. Naruto is a hero at heart. He can't stand seeing anyone being hurt, especially his friends. Ino is his friend, so he has to save her from Sasuke.
Well, in one possible scenario, Sasuke might be under some sort of dark influence. Naruto, being the hero he is, senses Hinata is in danger from Sasuke. Naruto arrives just in time, using his newfound powers, perhaps a combination of Sage Mode and his Nine - Tails chakra. He blocks Sasuke's attack aimed at Hinata and then tries to reason with Sasuke, reminding him of their past friendship and how Hinata is an innocent bystander. Eventually, Sasuke relents and Hinata is saved.
Well, in the fanfiction, Naruto might use his speed and agility to whisk Sasuke away from the fangirls. Maybe he creates a diversion, like using a clone to draw the fangirls' attention while he grabs Sasuke and flees to a safe place.
One possible plot is that Naruto uses his ninja skills in a creative way. For example, he could use the Transformation Jutsu to transform into someone the fangirls would be more interested in, like a famous singer or actor in their world. While the fangirls are distracted by this new 'celebrity', Naruto grabs Sasuke and they make their escape. Another aspect could be that Sasuke is initially reluctant to be 'saved' by Naruto because he doesn't want to seem weak. But as the situation gets more out of hand, he realizes he needs Naruto's help. The two then have a heart - to - heart conversation after escaping the fangirls about how Sasuke feels about his new - found 'fame' among the fangirls.
In many Naruto fanfictions, Naruto saving Sasuke from darkness is a popular theme. One aspect could be that Naruto uses his unwavering friendship. He constantly reminds Sasuke of their bond, like the times they trained together as kids. Naruto's positive attitude towards life and his dreams of becoming Hokage also inspire Sasuke. For example, Naruto might show Sasuke that there is more to life than revenge, and that by working towards a positive goal, he can find true happiness and purpose.
Maybe Sasuke is being manipulated by an evil force that wants to get at Naruto through Hinata. Since Hinata is important to Naruto, targeting her would be a way to hurt Naruto.
Well, it could be that Naruto witnesses Sasuke being bullied, like maybe some villagers are taunting her about her clan. Naruto, being the hero he is, jumps in and scares the bullies away. Then he takes Sasuke to a quiet place and they have a heart - to - heart about how they both feel like outcasts in some ways.
One possible plot twist could be that Sasuke has been under a genjutsu that makes him target Sakura, and Naruto has to break the genjutsu first to truly save her. Maybe the one who cast the genjutsu is a new, powerful enemy who wants to disrupt the bond between Team 7. Naruto, with his strong will and newfound powers, manages to find the source of the genjutsu and free Sasuke from its control, thus saving Sakura from harm.