One possible plot could be that Naruto somehow gets transported to the RWBY universe. He teams up with Neo. Maybe they start off as rivals, with Neo being distrustful of Naruto at first because of his strange powers. But as they face common enemies, like the Grimm in the RWBY world, they learn to work together and combine their unique abilities, like Naruto's jutsu and Neo's semblance.
One common theme could be the clash of different cultures. Naruto comes from a ninja - based culture, while RWBY has its own unique world with different rules. When it comes to Kali, her character might bring in elements of family and loyalty from RWBY. So, the cultural differences and how the characters overcome them can be a theme.
It could be a combination of villains from both universes. For example, Orochimaru from Naruto could team up with Salem from RWBY. Orochimaru is interested in the power of the Grimm and Salem wants to learn about the power of chakra. Their combined evil could be a huge threat to Naruto and Neo, forcing them to use all their skills to defeat this powerful alliance.
Well, a 'naruto x rwby fanfic' could center around a training arc. Imagine Naruto training the RWBY team. He could help Ruby improve her speed and combat skills by teaching her some of his ninja movement techniques. Yang could learn from Naruto how to better control her temper during battles, similar to how Naruto had to control his Nine - Tails' chakra. Meanwhile, the Naruto characters could also be learning about the Grimm and how to fight them. They could incorporate their ninja tools and jutsu to combat these new and strange enemies from the RWBY world.
Naruto and Ruby would be an interesting pairing. Naruto's positive and energetic nature would contrast well with Ruby's somewhat more reserved but determined self. They could bond over their shared goal of protecting their friends and worlds. Another great pairing could be Sasuke and Weiss. Sasuke's cool and brooding demeanor against Weiss' ice - cold exterior would make for some intense interactions. They could also learn from each other's combat styles. And then there's Kakashi and Blake. Kakashi's wisdom and experience as a ninja could help Blake with her own inner demons and her fight against the White Fang, while Blake could introduce Kakashi to the concept of the Faunus in the RWBY world.
Well, it's likely unique because it combines two very different universes, Naruto and RWBY. The 'daddy's little devil' aspect might add a certain family - dynamic or a more personal relationship angle to the story that sets it apart from other crossovers.
The world of 'naruto x kali rwby fanfic' is quite vast. A lot depends on what kind of story you're looking for. If you like adventure - based ones, you might find some where Naruto and Kali team up to face a common threat in a merged universe. It's also possible to find ones that focus more on the relationships between the characters. You really have to dig into different fanfic platforms and use the search filters to narrow down your search to find the best 'naruto x kali rwby fanfic'.
It's not appropriate in most cases. The RWBY series is aimed at a wide audience, including younger viewers. Self - harm is a serious issue that can be very triggering. While fanfiction can explore different ideas, this particular topic goes against the spirit of the RWBY franchise which is about growth, unity, and heroism. However, if it is clearly marked as containing disturbing content and is only aimed at an adult audience who can handle such heavy themes, it might be more acceptable, but still not in line with the general feel of the RWBY fandom.
One good bullied Naruto RWBY fanfic could be 'Naruto in Remnant: The Bullied Shinobi'. In this fic, Naruto is transported to the RWBY universe and faces bullying due to his different appearance and abilities at first. It shows how he overcomes those challenges and makes friends.