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.
In the Naruto series, Naruto doesn't have a biological sister in the original story. So in this fanfiction, the author probably creates a new character to be his sister. It could be an original character with unique abilities and a complex backstory that leads to the situation where Naruto dies by her hand.
First, give her a distinct personality. If Naruto is all about determination and Sasuke is brooding, she could be the calm and wise one. Then, give her a backstory. Maybe she was separated from Sasuke at a young age and grew up in a different part of the ninja world. This would shape her view of things. Another way is to show her relationships. For example, how she interacts with Naruto's friends like Sakura and Kakashi. This will help to flesh out her character more.
She could be an original character created specifically for this fanfiction. The author might give her unique abilities and a distinct personality to make the story more interesting.
If Sasuke's sister was in the picture, Naruto and Sasuke's relationship might soften more quickly. Naruto would see another side of Sasuke through his sister. He might also feel more of a connection to Sasuke's family. Sasuke, on the other hand, would see Naruto's genuine care for his sister, which could make him trust Naruto more.
One common theme is forbidden love. Since Sasuke's sister is from the Uchiha clan and Naruto is an outsider in a way, their relationship often goes against the norms and expectations of their respective clans and the ninja society as a whole.
It could be an original character created just for the fanfiction. Many fanfiction writers like to introduce new characters to add their own unique twists to the story.
Often, Hinata might be reimagined as a sister - like character. Her gentle and caring nature could be amplified in a sisterly role towards Naruto. Another could be Sakura, with her strong - willed personality, she could play a protective sister. And Tenten might also be included, perhaps bringing her weapon - based skills to support Naruto as a sister would.
There is no such official story in Naruto. The main focus in Naruto is on Naruto's growth, his friendships, and the overall plot related to the ninja world, not such an uncharacteristic and potentially inappropriate relationship.
Kiba could also be a good match. If Naruto's sister has an affinity for animals like he does, they could bond over their love for their respective animal companions. They could train together, and their combined skills with their animal partners could make them a formidable duo in battles and missions.
She could be very sad. After all, Naruto is likely an important person in her life. She might feel abandoned and start to question why Naruto left her.