It could be Kakashi Hatake combined with Blake Belladonna. Kakashi is a very experienced and skilled ninja with his Sharingan and a wide variety of jutsu. Blake has her shadow clones and her katana skills. The Sharingan could give Blake an edge in combat, and Kakashi could learn from Blake's acrobatic fighting style. Their combined stealth and combat abilities would make them a very strong combination.
Probably Sasuke Uchiha combined with Weiss Schnee. Sasuke has his Sharingan and all his powerful fire - based jutsu. Weiss has her Glyphs and ice - based powers. The Sharingan could help Weiss anticipate her enemies' moves better, and Sasuke could use Weiss's Glyphs to enhance his own attacks. Their combined powers of fire and ice would be a formidable combination.
I think Naruto Uzumaki combined with Ruby Rose could be extremely powerful. Naruto has his vast chakra reserves and powerful jutsu like the Rasengan. Ruby has her super - speed and the ability to use her scythe, Crescent Rose, with great skill. Together, they could be a force to be reckoned with. Naruto could use his clones to distract enemies while Ruby zooms in for the kill.
I think Qrow could be really powerful in this crossover. He has his own unique abilities in RWBY, and if he were to also master the Force, especially the more combat - oriented aspects like telekinesis to throw his weapon with more force or use the Force to enhance his reflexes, he'd be a force to be reckoned with. He also has a lot of experience in combat which would help him adapt to the new powers.
It's hard to say for sure, but Ruby could be a very powerful character. Her speed and scythe skills are already formidable in the RWBY universe, and if she were to gain some of the combat knowledge from For Honor, like the strategic thinking of a For Honor general, she could be extremely powerful. She might be able to quickly analyze her opponents' fighting styles and counter them effectively.
It's hard to say for sure, but many would argue that Naruto could be extremely powerful. His ability to use chakra, perform various ninjutsu, and access the power of the Nine - Tails gives him a huge edge. However, characters like Thor with his godly powers and the Hulk with his incredible strength also can't be underestimated.
If you combined Naruto's determination and power - up abilities with the Otsutsuki's unique dojutsu and chakra - related powers, and then added the Akatsuki's knowledge of various jutsu and their strategic thinking, it would be an extremely powerful character. Naruto already has the Nine - Tails' chakra and his Sage Mode. The Otsutsuki have things like the Rinnegan. And the Akatsuki members are no slouches in combat either. So this combined character would be able to take on just about any foe.
I think Qrow could be really powerful in a RWBY x Naruto fanfusion. He has his own set of skills and if he were to learn some of the more powerful jutsu from Naruto, like the Rasengan or some of the more advanced sealing techniques. His experience as a Huntsman and his natural combat abilities would be enhanced greatly. And Weiss with her Glyphs and if she were to learn some chakra - based techniques could also be a very powerful combination.
Gohan in his Ultimate form could also be a very powerful character in this combined fanfiction universe. He has incredible strength and intelligence in combat. But on the RWBY side, Ozpin has a lot of hidden power and knowledge. Still, when comparing their power levels, Gohan's physical strength and energy projection abilities are on a different scale. He could potentially take on even the toughest Grimm with ease. So, overall, Gohan might be among the most powerful in this crossover scenario.
Perhaps Naruto combined with Toph. Naruto's agility and combat skills along with Toph's earthbending mastery would be quite a combination. Toph could sense enemies from afar using her earthbending senses and Naruto could quickly engage them in combat. Also, Naruto could use his clones to help Toph with larger - scale earthbending projects, like building massive structures for defense or offense in a battle.
Sasuke could also be very powerful in this crossover. His Sharingan gives him an edge in combat, and if he were to form a bond with a Digimon, he could use his Sharingan to analyze and predict the enemy's moves better. Also, his ability to use different chakra natures could be combined with the Digimon's powers in unique ways. For example, using his Lightning chakra with an Electric - type Digimon to create super - charged attacks.
It's hard to say for sure. Naruto at his peak with Six Paths Sage Mode has incredible power, being able to fly, sense danger from afar, and use extremely powerful jutsu. But then there's characters like Thanos in the Marvel side. Thanos with the Infinity Gauntlet is almost unstoppable. He can manipulate reality, time, space and more. So it really depends on the context and how the writer wants to balance their powers.
It's hard to say. Naruto has his powerful ninjutsu like the Sage Mode and the Nine - Tails chakra. But Salem has her own dark magic and immortality. If Naruto can figure out a way to counter Salem's immortality, he could be very powerful against her. However, in the RWBY world, characters like Ruby with her silver eyes power also have the potential to be extremely strong. So it really depends on how the story is written.