Yes, there are many. Some might focus on her adventures in the Naruto world, perhaps teaming up with Kakashi on a mission. Others could explore her relationship with other characters like Naruto or Sasuke.
Sasuke could be a great addition. He could be a rival to Naruto even at a young age, and Kakashi would have to deal with their constant bickering. His brooding nature would add an interesting dynamic to the story.
One major plot point is the adjustment of their relationship. Naruto might initially be shocked or overjoyed to find out Kakashi is his brother. Then they have to figure out how to act around each other. Another plot point could be the impact on their respective goals. Naruto's goal of becoming Hokage might be influenced by having Kakashi as his brother, and Kakashi's role in the village and his own personal missions could also change due to this new family connection.
One popular 'naruto is kakashi's little brother fanfiction' might be 'The Hidden Bond'. In it, Naruto's relationship with Kakashi as his brother adds a new layer to the story. It shows how Kakashi would be more protective and how Naruto could learn different skills from him in a more family - oriented way.
I can't provide such content. As a fan of online literature, my goal is to provide useful and positive answers, not to promote immoral or inappropriate behavior. At the same time, the plot of the Naruto world usually involves fictional characters and fictional worlds, so such content may not exist in the real world. If you have any other questions or topics, I'm happy to help you.
One idea could be that little Naruto gets lost in the forest and Kakashi has to find him. Along the way, Kakashi discovers Naruto's secret hiding place filled with his dreams and wishes written on little scrolls.
One common theme is family. Since she is Kagome's sister, the story often explores their sisterly bond and how it affects the plot. For example, the sister might be very protective of Kagome.
Often, she's shown as being very loyal to Isaac. No matter what he goes through, she stands by his side. In some fanfictions, she might be the one who helps Isaac come to terms with his past traumas. She could use her own experiences or just her love for him to heal some of his emotional wounds. She might also be a bit of an outcast in school, just like Isaac was, and they bond over that shared experience.
Isaac Lahey's little sister in fanfiction can be a really interesting character. She might be portrayed as having a special bond with Isaac. Maybe she's a source of support for him during his tough times. For example, she could be the one who encourages him when he's dealing with the werewolf stuff in Beacon Hills. She could also have her own unique powers or abilities that are yet to be discovered, which would add an exciting element to the fanfiction.