Blake's ability to create shadow clones of herself would be very interesting in Konoha. It could be mistaken for a form of ninjutsu at first. Her cat - like agility and her weapon, Gambol Shroud, would allow her to move stealthily around Konoha. Her semblance could also be used for spying or sneaking up on enemies. Yang's super strength and her ability to absorb and redirect energy would make her a force to be reckoned with. She could take on powerful ninjas in hand - to - hand combat and use their own attacks against them. Her Ember Celica could also be modified to fit the ninja world's weapons style.
Ruby's speed and scythe - wielding skills could be very useful in Konoha. Her semblance of super speed would make her a formidable opponent in combat. She could quickly dodge ninja attacks and surprise her enemies. Her scythe could be seen as a unique and powerful weapon in the ninja world. Weiss's glyphs and ice magic would also be a great asset. She could use her ice to create barriers or freeze enemies in place, which is similar to some water - style jutsu. Her summoning of the Arma Gigas could be a new and powerful addition to the battles in Konoha.
Sakura would probably be very worried. She has always cared about Naruto deep down, so she might be constantly trying to find a way to bring him back. Kakashi, on the other hand, would likely understand Naruto's reasons to some extent. He might be sad but also respect Naruto's decision. As for Sasuke, if he is in the village at the time, he could be conflicted. He and Naruto have a complex relationship, and Naruto's leaving might make him realize how much Naruto actually means to him.
The kids in Konoha like Naruto would probably be very excited. They love new and different things, and Harry with his magic would be really cool to them.
Economically, there could be some impact as well. Naruto and Hinata are popular figures, and their presence in Konoha likely contributed to the local economy in some ways, such as through tourism (people coming to see the famous Naruto). Their departure might cause a dip in certain sectors that relied on their popularity, but it could also open up opportunities for new shinobi to rise and bring in new sources of income for the village.
Sasuke might be more understanding. Given his own experiences of leaving Konoha, he could respect Naruto's decision. However, he might also secretly plan to keep an eye on Naruto from afar to make sure he is safe.
The plot could involve a common enemy that threatens both the RWBY world and Konoha. So, the characters from RWBY and the ninjas of Konoha have to team up. For example, Salem's forces could somehow cross over into the Naruto world. The ninjas would be amazed by the unique abilities of the RWBY characters like semblances. In turn, the RWBY team could learn about chakra and ninjutsu. This would lead to some interesting training sessions and battles where they combine their powers in creative ways.
In a time travel fanfiction, Naruto's ability to sense danger might be sharper as he knows the big events that are supposed to happen. He could also train his Rasengan in new ways based on his future experiences. Sakura might be able to use her strength in a more controlled manner, having seen the consequences of over - using or under - using it in the future. Shikamaru could have an edge in planning battles because he's aware of different fighting styles from the future. Choji could find new ways to boost his strength using the knowledge he has of future food combinations that enhance chakra. And Ino could use her mind - transfer jutsu more precisely, having learned from future mistakes.
When the Konoha 12 time - travel to the past, their abilities would change significantly. Take Rock Lee for example. In the past, there might be different training methods that could further boost his physical strength and taijutsu skills. He could learn from the masters of old and bring back new techniques. For Ino, her mind - transfer jutsu might work differently in the past due to the different mental states and chakra signatures of the people then. And for Shikamaru, his strategic thinking would have to adapt to the different political and combat situations of the past. Their abilities would not only change in terms of power but also in how they are applied in the context of the past's ninja world.
Ruby would likely be very excited to explore Earth. She might see it as a new adventure and would be eager to make new friends. Her weapon skills could also make her stand out in self - defense classes or martial arts clubs.
For Naruto, it would be a big shock. He's always seen Sakura as an important part of the team. He would probably feel guilty, thinking he might have done something wrong. Sasuke might be more reserved in his reaction, but deep down, he would also feel the loss. Kakashi would be worried about her safety. The other ninja in Konoha might start to question the unity of the village if someone like Sakura, who was so well - known, left. And the young ninja who looked up to Sakura would be disappointed and might even lose some motivation in their training.
He might use his magic skills to stand out. For example, his ability to perform spells could be seen as a unique talent in Konoha. His shop could become a place where ninjas are curious to visit and learn about different kinds of magic.