There's no way to know the author just from this title. Fanfiction is a vast world with countless creators. It could be a relatively unknown writer who just wanted to explore this unique and somewhat dark concept. Maybe it was written by someone who was experimenting with different ways to tell a story within the existing fictional universe related to Sakura.
In this kind of fanfiction, the death of Sakura in a wave might be used to create a sense of tragedy. It could be a way to explore themes like loss, the power of nature, or the fragility of life. For example, it might show how a character like Sakura, who could be seen as innocent or full of life, is suddenly taken away by the force of the wave, which can be a very powerful and emotional concept.
I'm not sure specifically as there could be many different 'sakura dies in wave fanfic' out there. It might involve a story where a character named Sakura meets her end in a wave - related scenario, perhaps a tsunami or a powerful ocean wave in a fictional world.
Since I don't know the specific fanfic, Sakura is likely one of the main characters as it's in the title. There may also be characters related to her, like her friends or family who are affected by her death in the wave.
In this kind of fanfiction, Sasuke could die from a sneak attack. He might be so focused on his main target during the Wave mission that he doesn't notice another hidden threat. And this hidden enemy could strike him when he least expects it, leading to his death. For example, an assassin could be hired to specifically target Sasuke and use some sort of poison or a deadly jutsu that he can't defend against in time.
The setting of Wave can add a sense of mystery and adventure. The village has its own unique culture and history. For example, it might have old ruins or hidden caves where Naruto and Sakura could discover the lemon - related mystery. The seaside location also means there could be threats from the sea, like pirates or sea monsters, which would make their adventure more exciting and dangerous.
The team dynamic would be completely shattered. Sakura would be devastated as Sasuke was someone she had strong feelings for. Kakashi too would feel responsible for not being able to protect Sasuke. This could lead to the team splitting up or at least going through a long period of internal turmoil and lack of cooperation. And it might also change the way the village views their team, perhaps with disappointment or a sense of loss.
Well, I'm not sure about a single highly recommended one. But in general, in these fanfictions, Naruto's death for Sakura can lead to many different plot developments. It could make Sakura stronger, or it could drive a wedge between her and other characters who might blame her in some way for Naruto's sacrifice.
I'm not sure specifically as there could be many different versions of such a fanfic. But generally, it might involve Naruto facing some overwhelming danger in the Wave arc that leads to his death, perhaps a more powerful enemy than in the original story or a failed mission that costs him his life.
Sakura would be devastated. She would probably blame herself for Naruto's death since he died protecting her. She might go into a state of deep depression at first, withdrawing from everyone.