Maybe he starts to train with one - armed techniques. He could learn from other one - armed ninjas if there are any in the fanfiction world. His friends would also play a big role. They might encourage him to keep going or help him in his training.
Maybe he was protecting someone in Wave. He's always the self - sacrificing type, so he could have put himself in harm's way to save a villager or a friend.
One possible aspect of Finn losing his arm in fanfiction could be how it changes his physical capabilities. He might have to adapt his fighting style, perhaps relying more on his legs or using his remaining arm in more creative ways. For example, he could learn to use his sword one - handed in a whole new way that surprises his enemies.
It could be an old enemy who takes advantage of Percy's weakened state. For example, Kronos might see this as an opportunity to finally defeat Percy and take over Olympus. Since Percy has lost an arm, Kronos might think he's more vulnerable and launch a new attack.
One possible storyline could be Percy's journey of learning to adapt to life with one arm. He might struggle at first with simple tasks like getting dressed or holding a weapon. Another could be him facing his enemies who now see him as weakened due to the loss of his arm, but he proves them wrong with his newfound determination and creative combat techniques.
In some fanfictions where Allen loses his arm, it could lead to a whole new set of character developments. He might become more dependent on his comrades at first. For example, Lenalee could be there to help him with daily tasks that require two hands. This could strengthen their bond. Also, it might make Allen more determined to fight against the Earl. Losing his arm could be seen as a sacrifice that fuels his hatred for the dark forces. He could start training to use his other abilities more effectively, like his Innocence in a different way that doesn't rely so much on his physical arm.
In the context of the fanfic, it could also impact his relationships. His friends might be overly protective, which Naruto may not like. Or, he could inspire others with his determination to keep going despite his injury. It might also change how he is perceived in the ninja world. Some may see him as weakened, while others could view him as even more of a hero for his ability to persevere.
They could have heart - to - heart conversations. For example, Shanks could share his past adventures and the lessons he learned from them with Luffy. This would help Luffy gain more wisdom and also deepen their connection.
To develop Shanks further in fanfiction, we could look at his sense of morality. Shanks is known for his honor among pirates, but what if there was a situation where his moral code was really put to the test? For instance, if he had to choose between saving his crew or a large number of innocent civilians. This would show his internal struggle and how he might grow from such a difficult situation. His relationships with other major characters like Whitebeard could also be explored in more depth. Maybe there were some unspoken agreements or rivalries between them that are not fully known in the original story. By fleshing out these aspects, Shanks' character can become more complex and interesting in fan - made stories.