Kushina could potentially go on a rampage against the enemy who caused Naruto's death. If there was an identifiable foe, her rage would be uncontrollable. This could lead to a large - scale conflict in the fanfiction world. Also, Naruto's friends and allies would be deeply affected, and some might even lose their will to fight without him.
There could be a power vacuum. Naruto was a powerful force in the world of the fanfiction. His death might lead to other villages or groups trying to take advantage of Konoha's weakened state. Kushina's reaction would also play a role in how the village copes. If she becomes too consumed by grief and unable to lead or support, it could further destabilize the situation.
The village of Konoha would be in mourning. Naruto was a hero to them. Kushina's grief could spread throughout the village, dampening the spirits of everyone. There might be a sense of hopelessness as Naruto was often seen as the one to bring hope in difficult times.
One consequence could be a shift in the power dynamics. If Kushina is alive and now reunited with Naruto, they could form a powerful duo. This might make their enemies more cautious or even lead to new alliances being formed against them. Also, Naruto's morale would be greatly boosted, and he might become even more determined in his goals, which could speed up the overall plot development.
One consequence could be that the perpetrator is severely punished. Artemis would not tolerate such an act, and she would use her power to make sure justice is served.
She would likely be devastated. Kushina has a deep connection to Naruto as his mother. She might first go into denial, unable to accept that her son is gone. Then, she would probably be filled with intense grief and anger. She could potentially lash out at those she blames for his death or just break down completely, mourning all the things Naruto could have been and all the time they missed when he was growing up.
She might be overjoyed. After all, Naruto is her son. She could immediately rush to find him and embrace him tightly, tears of happiness streaming down her face.
One possible fanfiction could be about Kushina finding Naruto in a situation where he's lost in a forest. Maybe she uses her unique chakra sensing abilities to track him down. It could be a heartwarming story of a mother reuniting with her son.
One common plot is Kushina finding Naruto in a different time or dimension. For example, she might end up in the future where Naruto has grown up and she gets to see the kind of person he has become. It's an emotional and interesting concept as she gets to witness all his achievements and the challenges he has overcome.
Fleur might expose them. If they are students, they could face expulsion from Hogwarts.
Well, Kushina could initially be disappointed. But then she might see it as an opportunity to help Naruto find his true passion. She could start introducing him to different things, like maybe some traditional Uzumaki family skills that don't necessarily involve being a ninja in the typical sense. This way, Naruto could still have a sense of purpose and connection to his heritage.
Well, one possibility is that Dark Naruto would be overjoyed. After all, Kushina is his mother. But at the same time, he could be very conflicted. His dark side might make him suspicious of her motives. He could test her in various ways to see if she's really who she says she is. And Kushina, on her part, would probably be heartbroken to see what her son has become.
Some of his other friends might react differently too. Some may be more cautious around him, worried about the power of the jinchuuriki within him. But those who truly trust Naruto, like Shikamaru, might not change their attitude much. They would see that Naruto is still the same person he was before, just with this added aspect to his identity.