It might actually be Elie from Rave Master. She has a very mysterious past and her powers are not fully understood. In a crossover, she could potentially unlock new levels of her power. Her ability to use the Rave stones in unique ways and her connection to the Rave could make her a very formidable opponent. Also, she has a strong will, which is an important factor in any battle.
Lucy and Elie would make an interesting pairing. Lucy is a celestial wizard, and Elie has her own unique powers. They could bond over their experiences as female characters in a world full of powerful men. Maybe they could exchange stories about their travels and the challenges they've faced, and also team up to use their powers in a creative way to solve problems.
I think Haru and Natsu would be a great pairing. They are both hot - headed and have a strong sense of justice. Their different magic types, Haru's Rave power and Natsu's Fire Dragon Slayer magic, would create some really cool action scenes. They could learn from each other and grow as characters while on an adventure together.
Definitely Haru and Natsu. They are both hot - headed and full of energy. Their interactions would be really explosive. Haru with his Rave power and Natsu with his Fire Dragon Slayer magic would probably start off by competing with each other in terms of strength, but then realize they need to work together. Another interesting interaction could be between Elie from Rave Master and Lucy from Fairy Tail. They are both strong female characters with different kinds of magic, and they could share their experiences and knowledge about magic.
It's really hard to say. Naruto in his strongest form, like when he has the power of all the tailed beasts, is extremely powerful. He has incredible strength, speed, and the ability to use a vast array of jutsu. However, Aang in the Avatar state has access to all four elements and can be a formidable opponent. If we consider the Avatar state's spiritual connection, it could give Aang an edge in a battle of wills.
Sesshomaru could also be a very powerful character in this crossover. He has his own powerful sword, Bakusaiga, and his inhuman strength and speed. He is very experienced in combat against demons. Compared to Naruto's friends like Sakura, Sesshomaru would likely be much more powerful in terms of raw strength and combat ability. But Sakura has her own medical ninjutsu and superhuman strength when she releases her inner power, which could also be useful in different situations.
Sasuke would also be very powerful. His Sharingan gives him enhanced perception and the ability to copy moves. In the SAO world, he could quickly analyze the fighting styles of opponents and come up with counter - strategies. His Chidori and other lightning - based jutsu could be very effective against the digital enemies in SAO.
However, we can't forget about Steve. He has been living in the Minecraft world for a long time. He has in - depth knowledge of how to build the most powerful weapons and structures. He can use his pickaxe with great skill, which could be as effective as a ninjutsu in some cases. Also, his ability to survive in the Minecraft world's harshest conditions gives him an edge over the Naruto characters who are new to this environment.
It could be Naruto in his Sage of Six Paths mode. He has incredible power, with the ability to fly, use various powerful jutsus, and his chakra is off the charts. In a fight against the characters from Toriko, his speed and strength would be very difficult to match.
In a naruto tekken crossover fanfiction, I think Orochimaru could be a very powerful character. He has the ability to use various snake - based jutsu and is a master of deception. He could potentially use his skills to outwit Tekken characters. But on the Tekken side, characters like Heihachi Mishima with his Mishima - style karate and his decades of fighting experience would also be a formidable force. It really depends on the environment and the nature of the encounter.
It's likely Naruto himself. His ability to create countless shadow clones gives him a huge advantage in battle. He can overwhelm opponents with sheer numbers. Also, his rasengan is a very powerful attack. In the Castlevania world filled with vampires and demons, he could quickly adapt his skills to take on these new foes.