Maybe the plot could revolve around their combined combat styles. Naruto is known for his flashy and powerful ninjutsu, while Blake has her unique swordsmanship and shadow clones in RWBY. They could develop new fighting techniques together, like Naruto teaching Blake some of his chakra - based moves and Blake showing Naruto how to better use stealth in combat.
The rest of Team RWBY would definitely be influenced. Naruto's loyalty to his friends, which is a big part of his character, would set an example for the whole team. He could also be a mediator in any conflicts within the team. For example, if Weiss and Blake have an argument, Naruto could use his experience with Sasuke and his other friends to help them resolve their differences. His presence would also attract the attention of other characters in the RWBY world, like the professors at Beacon Academy, who would be curious about his abilities.
One plot possibility is that Naruto's Truth - Seeking Balls are seen as a valuable asset by the RWBY characters. They might try to figure out how to replicate or use the power in some way. Another is that villains in the RWBY world would target Naruto specifically because of his powerful orbs. For example, Salem could see the Truth - Seeking Balls as a threat to her plans.
The fanfic might explore Blake's unique abilities and how they play out in the Naruto setting. Maybe there's a crossover of powers and teamwork.
The fanfic could explore how the twin brother's presence affects Ruby's development. He could be more reserved or cautious, which might balance out Ruby's sometimes impulsive nature. For example, in a mission, Ruby might be eager to charge forward, but her brother could hold her back and suggest a more strategic approach. This dynamic could lead to character growth for both of them.
The plot could involve Mikoto training Naruto to face the threats that the Hidden Leaf Village is facing. She might see Naruto's potential and decide to groom him into a great ninja who can protect the village. This could include sending him on special missions, teaching him strategic thinking, and how to work in a team. Along the way, Naruto could learn about the history of the Uchiha clan from Mikoto, which could be relevant to the overarching plot of the fanfic, perhaps related to some ancient threats or secrets that the Uchiha were guarding.
One possible story could be about Naruto finding himself in the world of Blake Belladonna. He might use his ninja skills to help Blake and her friends in their fight against the Grimm. Naruto's positive attitude and never - give - up spirit could inspire Blake to be more confident in her own abilities.
One possibility is that friendly Grimm could completely change the dynamic of the RWBY world. Instead of being pure threats, they might become allies or at least neutral entities. This could lead to new storylines where characters have to re - evaluate their understanding of the Grimm. For example, Ruby might be initially hesitant to trust a friendly Grimm but then realizes it can help in a certain situation.
One possibility could be that the RWBY characters are transferred to Earth and have to adapt to our modern society. They might be shocked by the lack of Grimm, but also fascinated by our technology and culture.
If Jaune and Blake were expelled in a fanfic, it could lead to a whole new set of adventures. Maybe they would form their own group outside of Beacon. They could encounter new enemies and allies, and their relationships with the remaining RWBY characters would be greatly affected. For example, Ruby might be really sad and try to find a way to bring them back. Yang could be angry at the school for expelling Blake. And Weiss might see it as an opportunity for the school to become more 'elite' but still have some mixed feelings.
Well, a great plot might be that Blake discovers a hidden power within herself. This power could attract both friends and foes alike. She might have to deal with the jealousy of some of her comrades while also trying to master this new ability. Or perhaps she gets caught in a political intrigue between different kingdoms in Remnant, and her actions as a Futa character could bring a new perspective to the story.