One possible antagonist could be Orochimaru. He might see Erza as an interesting specimen to experiment on, due to her unique magic abilities. Another could be some of the dark guilds from Erza's world that cross over into Naruto's world and try to cause chaos.
Well, one possibility could be that Naruto, with his strong sense of justice and his own experiences of growing up alone, takes Erza under his wing. He might teach her some of his ninja skills, like how to move stealthily or use chakra in a new way. And Erza, being the strong - willed character she is, would adapt these skills into her own fighting style.
Well, it could be really interesting. Erza might teach Naruto her strong sense of discipline. Naruto would probably grow up with a different fighting style, influenced by Erza's magic-based combat skills. He might also become more serious and less of a prankster, as Erza has a no - nonsense attitude.
Obviously, Naruto and Erza would interact a great deal. Naruto would also probably interact with Erza's friends from Fairy Tail. He might meet Natsu and they could have some interesting battles or friendly competitions. He could also interact with Lucy, and perhaps learn about celestial spirits from her.
Well, in this fanfic, maybe Naruto is an orphan in Erza's world from the start. Erza, seeing his potential and his kind heart, decides to raise him. She teaches Naruto discipline, which is something he might lack initially. Naruto, in turn, brings his never - give - up attitude to Erza's guild. They go on adventures where Naruto uses his shadow clones to help out in different tasks, like rescuing people or fighting off dark magic users. And Naruto also starts to adopt some of Erza's sense of justice.
Obviously, Naruto and Erza would be the main characters. Naruto is the young ninja with a lot of potential and a big heart. Erza is the strong and capable character who takes on the role of raising Naruto. There might also be other characters from Naruto's world or Erza's world that make appearances, like Naruto's friends from Konoha in cameo roles, or Erza's guildmates who interact with Naruto as he grows up.
It's possible that such a fanfiction exists. In the world of fanfiction, writers like to explore different relationships and plot twists. But it's important to note that Erza and Naruto are from different fictional universes. This kind of crossover with a cheating plot might be more of a niche or even a shock - value type of story. If it does exist, it may not be very popular among fans who prefer more positive and in - character stories for their favorite characters.
It's really hard to say. Naruto has his powerful ninjutsu like the Rasengan and can call on the power of the Nine - Tails. But Erza is no slouch either. She has a wide variety of armors with different abilities. If it's a long - distance fight, Naruto might have an advantage with his ranged attacks. However, if it gets up close, Erza could use her swords and combat skills to hold her own.
Well, in such a fanfiction, Harry might grow up with Erza's strong sense of justice and combat skills. He could be trained in a more martial - arts - like way compared to his Hogwarts training. Erza might instill in him a different set of values, perhaps more focused on loyalty to comrades and a strict code of honor.
Maybe they could be rivals at first. Erza is highly competitive, and Naruto is always looking to prove himself. Their initial rivalry could turn into respect as they see each other's skills in combat. For example, Naruto might be impressed by Erza's ability to change armors and use different types of magic, while Erza could admire Naruto's never - give - up attitude and his powerful jutsu.