Another possibility is that she was thought to be dead but actually survived. She could have her own story of survival and now she reappears in Naruto's life, bringing with her a whole new set of challenges and opportunities for Naruto.
In this kind of fanfiction, Naruto might learn some family secrets from his aunt. Maybe she'll tell him about his parents' early days that he never knew before.
A possible plotline could be that Naruto's mom and aunt discover some hidden power within Naruto that they need to help him control. They then train him in secret to master this power without the knowledge of the village at first.
One possible plot could be that Mei has some secret knowledge about Naruto's family that she reveals to him. This could lead to Naruto going on a journey to discover more about his heritage. Along the way, they form a strong bond and help each other out in various battles and difficult situations.
The main characters are Naruto and Mei. Naruto is a powerful ninja with his unique jutsus and a strong will. Mei, on the other hand, is a skilled kunoichi with her own set of abilities. In this fanfiction, their relationship, whether it's a mentor - mentee or a more complex one, will be the focus.
One possible plot could be that Lemon has some special knowledge or power that she passes on to Naruto, while Kushina looks on with pride. Maybe Lemon has a connection to an ancient ninja art that Naruto needs to master to defeat a new threat in the village.
One could try looking on fanfiction.net. There might be some interesting stories there about Naruto, his mom, and his aunt that focus on family relationships, like how they support Naruto in his journey to become a great ninja.
There are some out there. You can try searching on fanfiction websites like FanFiction.net or Archive of Our Own. Just type in the relevant keywords and you might find some interesting stories about the relationships between Naruto, Kushina and this so - called 'aunt Lemon' in the Naruto - inspired fanfiction world.
One problem is that it can distort the original Naruto universe's family and relationship dynamics. The Naruto series has a set of values and relationships that are meant to be positive and inspiring, and this kind of fanfiction can go against that.
She could be an Uzumaki. Since Naruto is from the Uzumaki clan, it would make sense for his grandmother to be part of this powerful and mysterious clan. Maybe she has some unique abilities related to the Uzumaki's sealing techniques.
He could be a powerful and respected shinobi from the Uzumaki clan. Given the Uzumaki's reputation for strong chakra and unique abilities, Naruto's grandfather might have been a key figure in the clan's history.