She could be a great mentor. Since she was a powerful ninja, she could teach Naruto new jutsus and fighting strategies. Also, she could offer him emotional support, something Naruto lacked growing up.
Kushina could play the role of a protector. Given her strength and experience, she would keep Naruto safe from harm. Moreover, she could help Naruto understand his Uzumaki heritage better, which was a big part of his identity. She might also introduce him to other Uzumaki - related things like secret techniques or family traditions. This would not only make Naruto more powerful but also give him a stronger sense of self.
One possible reason could be a misunderstanding. Maybe some false information was spread about Kushina being a threat to the village, and Naruto, in his role as Hokage or a powerful figure, felt he had no choice but to banish her to protect the village. Another reason might be related to some sort of dark influence or curse that made Naruto act out of character and banish her.
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.
Jiraiya could also be involved. Maybe before he died, he left some sort of prophecy or clue about reviving the dead. Naruto could remember something Jiraiya said or find a hidden scroll that Jiraiya left specifically for this purpose. And Jiraiya's connection to the toads might also provide some sort of magical or spiritual assistance in the revival process.
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.
It could also be a key to unlocking new ninja techniques. Naruto might learn something from the wolf's natural instincts and incorporate it into his fighting style. For instance, the wolf's speed and agility could inspire Naruto to develop a new movement technique.
One possible plot twist could be that Kushina's survival was part of a grand plan by an unknown entity. Maybe she was hidden away to protect Naruto from some greater threat that was yet to be revealed. Another aspect could be the emotional turmoil Naruto would go through. He'd be overjoyed, of course, but also confused and maybe a bit angry that he was made to believe she was dead all this time.
One possible plotline could be that Kushina's survival changes Naruto's upbringing completely. Instead of being an orphan, he grows up with a loving mother. This could lead to him being more confident and less of an outcast in the village at a young age. He might also learn about the Uzumaki clan's secrets earlier from his mother, which could make him a more formidable ninja even faster.
Naruto would gain more confidence. With Kushina by his side, teaching him and giving him support, he would feel more secure in his abilities. He would know that he has his mother, a strong ninja in her own right, guiding him.
Perhaps Sister Lemon is a keeper of ancient Uzumaki secrets. In a fanfiction, this could be really exciting. She could share these secrets with Naruto and Kushina at crucial moments. For example, if there was a threat to the village that could only be countered with an old Uzumaki jutsu, she would be the one to know about it and teach them how to use it. Her role as the keeper of secrets would make her a very important character in the story.
In a Naruto alive with Kushina fanfiction, it could start with Kushina surviving the Nine - Tails attack. She then helps Naruto harness the power of the Nine - Tails in a more positive and controlled way. They might have a mother - son bond that is stronger than ever, and together they face new threats to the Hidden Leaf Village.