Ruby is an obvious choice as she has that lead - character feel. Her naivete and determination are traits that can be paralleled to Dorothy. She would be the one to lead the group through the strange world of Oz.
Weiss has the elegance and the magical abilities that could make her a main character. She could be like Glinda the Good Witch in some ways, using her glyphs and knowledge to help the group navigate Oz. But at the same time, she might also have her own journey of self - discovery.
Ruby is a likely candidate. She's already a skilled fighter with her scythe, and her eagerness to learn new techniques would make her adapt well to Santoryu. Her speed and agility could be enhanced with the three - sword style.
Ruby is often very popular in rwby wizard fanfic. Her energetic and determined personality makes her a great candidate for magical adventures. She can easily be imagined as a powerful wizard with her scythe as a magical weapon. Weiss is also popular. Her noble background and her already - existing Glyph abilities can be expanded upon in a wizard - themed fanfic. Another popular character is Blake. Her cat - faunus abilities combined with wizardry can create some really interesting storylines, like using her cat - like senses in magical hunts.
Well, obviously Corvo would be one of the main characters. He would bring his own set of skills, like his combat abilities and stealth techniques. Then, from RWBY, Ruby Rose could be a main character. Her leadership skills and scythe - wielding combat style would contrast and interact with Corvo in interesting ways.
Ruby is a likely winner. She has her powerful scythe, great speed, and strong leadership skills. Her ability to quickly analyze a situation in battle gives her an edge. Weiss also has a good chance. With her Glyphs and powerful summoning abilities, she can control the battlefield. Blake is another one. Her speed and shadow - cloning ability make her a tough opponent. And Yang with her super strength and ability to take a hit and then counterattack fiercely could also be a top contender.
Yang Xiao Long could be a key character. Her brash and powerful fighting style might be pitted against the kind of foes from the Man of Steel universe. And Weiss Schnee, with her family's influence and her own ice - based powers, could also be in the spotlight. She might have to use her skills in a different context, perhaps in a more technology - heavy and super - powered environment like in Man of Steel.
Yang and the Yellow Ranger. Yang is a strong and fiery character in RWBY, known for her brawling combat style. The Yellow Ranger in many Power Rangers shows is also a strong fighter. They could bond over their love for a good fight and share tips on how to improve their physical combat skills. Plus, their personalities are quite compatible, with both being bold and confident.
I think Weiss could also be central. She comes from a powerful family and has a lot of influence. In a story about watching the future, her knowledge of politics and her strategic thinking could play a big role. Also, her relationship with the other characters, especially Ruby, would be important in how they all react to what they see in the future. Blake might also be central as she has her own complex backstory and her views on the relationship between humans and Faunus could be greatly affected by seeing the future.
Naruto and Ruby are very likely to interact. Ruby is the main character in RWBY, and Naruto being the central figure in his own story, their paths would surely cross. Ruby's enthusiasm for combat and her leadership qualities could make for an interesting dynamic with Naruto's determination and his own brand of leadership. Also, Weiss could interact with Naruto. Given Weiss's strict upbringing and her proficiency in combat, her reaction to Naruto's unorthodox ninja techniques would be fascinating.
Obviously Naruto would be one of the main characters as the title implies he is being trained. And then, the RWBY characters like Ruby, Weiss, Blake and Yang would also be main characters since they are the ones doing the training.
Well, Naruto for sure. His immortality gives him a unique place in the story. From RWBY, Yang Xiao Long could be a main character. Her brash and confident fighting style would create an interesting dynamic with Naruto. Blake Belladonna, with her mysterious past and cat - like abilities, might also be a central figure. Her more reserved nature compared to Naruto's open - heartedness could lead to some great character development moments. And of course, Ruby and Weiss as mentioned before, would also be important in shaping the story around an immortal Naruto in the RWBY world.