I'm not sure if there is such a specific fanfiction. There are countless Naruto fanfictions out there, and while the idea of Naruto being Kimimaro's brother is quite an interesting and unusual concept, it might not be a common one. You could try searching on major fanfiction websites like Fanfiction.net or Archive of Our Own to see if it exists.
I'm not entirely sure as the statement is rather unclear. It could potentially be about a fan - made story where Kimimaro, a character from Naruto, serves in some capacity within the narrative of the fanfiction. Maybe he serves a particular character, or serves a cause within the made - up story.
One possible scenario in this fanfiction could be that Naruto discovers Haku and Kimimaro in a dire situation. Haku, with his ice techniques, and Kimimaro, with his powerful bone abilities, are perhaps being overpowered. Naruto, being the hero he is, jumps into the fray. He may convince them to change their ways and join him in Konoha, as he once did with Sasuke. This would not only show Naruto's growth as a ninja but also his ability to bring out the best in others.
One common theme is the exploration of loyalty. Sai has his loyalty to Konoha, while Kimimaro was extremely loyal to Orochimaru. Fanfics often play with how these loyalties interact when the two characters cross paths.
Another theme can be redemption. Kimimaro was a character with a troubled past. In some fanfics, his journey with Naruto and Sai can be about finding a new purpose and redeeming himself. It's about breaking free from his previous loyalties and forging a new path with his newfound comrades.
In some fanfictions, Kimimaro survives his illness and later crosses paths with Naruto during a major ninja tournament. They end up competing against each other in the tournament. Kimimaro shows off his new - found control over his abilities and Naruto uses his latest jutsu, leading to an intense and exciting battle.
Their relationship could be one of mutual respect. Naruto respects everyone's potential for good, and Kimimaro, if given the chance in fanfiction, could respect Naruto's strength and determination. They might start off as strangers, but as the story progresses, they could form a bond. For example, Naruto could help Kimimaro find a new purpose in life after being used by Orochimaru for so long. And Kimimaro could be a valuable asset to Naruto in battles, using his bone - based jutsu to their advantage.
Well, Naruto and Kimimaro could start off as strangers who are forced to interact because of the saving situation. As time goes on, they discover that they both have a longing for a family and a place to belong. They would open up to each other about their past traumas. This sharing would create a deep emotional connection between them, and they would become close friends, supporting each other through future challenges.
One possible plot could be that Kimimaro, who was once an enemy, is resurrected in a strange way. Naruto, being the ever - optimistic and forgiving ninja, tries to understand Kimimaro's past and the pain that drove him to be Orochimaru's tool. They could end up training together, with Naruto teaching Kimimaro about the power of friendship and the will of fire. Kimimaro, in turn, could show Naruto some unique bone - related jutsu techniques and how to counter them, leading to a new bond between the two.
Their relationship could develop in a very brotherly way. Naruto would see Kimimaro as someone who needs help and guidance, just like he saw many of his friends in the past. He would teach Kimimaro about the value of life and the importance of protecting others. Kimimaro, in turn, would become very loyal to Naruto, protecting him when needed.