If Ace joins Luffy's crew in fanfiction, his character could develop by becoming more of a team player. He's used to being on his own to some extent, but with the crew, he'd have to rely on others and they on him. His relationship with the other crew members would shape him, like learning patience from Chopper or strategy from Nami.
In fanfiction, if Ace joins Luffy's crew, it would be an amazing addition. Ace's powerful fire abilities would make the crew even stronger in battles. He could also bring a different dynamic to the group, as he has his own personality and backstory. His relationship with Luffy would be a central focus, and we might see more brotherly bonding moments on the ship.
If Naruto joins Iwa in fanfiction, his character development could be significant. He'd have to deal with being an outsider at first. This would test his resolve and make him grow in patience. He may also start to see the world from a different perspective, as Iwa's goals and values might be different from Konoha's. This could lead to him becoming more diplomatic and understanding of different ninja cultures.
If Shirou joins Fairy Tail in fanfiction, his character might develop a greater sense of belonging. He has always been on his own journey, but in the guild, he'd be part of a team. This could lead to him being more open about his feelings and past experiences. Also, his combat skills could evolve as he trains with the other members and is exposed to new fighting styles and magical techniques. He might even start to develop his own form of magic - influenced combat, which would be a new and interesting aspect of his character growth.
His character could become more stealthy. Since the Hidden Mist Village is known for its assassins, Naruto might pick up some of their skills and become more proficient in covert operations. This would add a new dimension to his fighting style.
In a fanfiction, Ace's own experiences and battles could be related to Luffy's metabolism. Maybe Ace has some knowledge about a special fruit or power that could enhance Luffy's metabolism. He could share this with Luffy, leading to a new adventure where Luffy tries to obtain this thing to boost his metabolism. Also, Ace's death could have an impact on Luffy's metabolism. Luffy could go into a state of shock or extreme grief that either slows down or speeds up his metabolism in an unexpected way.
If a marine joins Luffy's crew in a fanfic, it could be quite interesting. At first, there might be a lot of distrust among the crew members. After all, they've been fighting against marines for a long time. But if the marine has a strong sense of justice that aligns with Luffy's own view of right and wrong, they could gradually be accepted. For example, the marine might bring in some new combat techniques or knowledge about the navy's operations that could be useful to the Straw Hats.
Well, for one thing, Naruto's experience in dealing with various types of enemies in his own world would be a great asset. He could share his knowledge of battle strategies with the Straw Hat Pirates. Also, his ability to befriend people easily, as seen in how he got along with his own comrades in Konoha, would help him gel with the crew members. Plus, his sense of loyalty is unwavering, which is a quality highly valued in Luffy's crew. The dynamic on the ship would change completely with Naruto around, as he has his own unique way of looking at things and approaching problems.
His character could become more complex. He'd have to balance his own values from Konoha with the new ones in the Covenant. This internal struggle would likely make him more mature. For example, he might question his previous beliefs about power and leadership.
He'd probably become more confident. Being around such powerful heroes would boost his self - esteem.
If Harry joins the Varia in fanfiction, his character would undergo a substantial transformation. His moral compass might be adjusted as he is exposed to the Varia's different ethical code. He might become more ruthless in combat situations, as the Varia are not as restrained as the wizarding world in terms of using force. His relationships would also change. He would no longer be surrounded by his Hogwarts friends, but by a group of tough - minded individuals. This would force him to communicate and interact in new ways. His identity would shift from being mainly a wizard from Hogwarts to being a member of the Varia, which would influence his self - perception and how he presents himself to the world.