In some fanfictions, Naruto might get the scar on his eye during a particularly intense battle with a powerful enemy. Maybe it was a close encounter with a rogue ninja's weapon that managed to leave a mark on his eye area.
Well, in certain fanfiction stories, the scar on Naruto's eye could be the result of a self - sacrifice. He might have been protecting someone dear to him, like Sasuke perhaps. And in the process, he got injured near his eye, leaving a permanent scar as a reminder of his heroic act. This would also add more depth to his character and his relationships in the fan - created story.
There could be a fanfiction where Naruto gets the scar on his eye as part of a training accident. He was pushing himself too hard in a new and dangerous form of training. His body couldn't handle it perfectly, and there was an unexpected backlash. A burst of energy or a piece of debris from the training ground hit his eye, causing the scar. This would show his determination to become stronger even at the risk of getting injured.
Todoroki got his scar because of his father's cruel actions. His father, Endeavor, deliberately caused the scar to try and shape his son's powers.
Well, it could be due to a powerful enemy attack during a fight in Wave. Maybe an enemy with a sharp weapon or some dangerous jutsu managed to strike Naruto's eye.
One possible story is that Naruto got the scar while on a secret mission. He was infiltrating an enemy base alone and got into a fight with a skilled guard. The guard's weapon grazed his eye, leaving the scar. This event could then be a turning point in the mission and Naruto's character development in the fanfiction.
In some fanfics, it could be through a curse. Maybe an old, forgotten curse targets Naruto and as a result, he gains an eye bloodline. Another way is through some sort of experiment gone wrong. Scientists or rogue ninjas might be experimenting with bloodlines and Naruto accidentally gets affected.
Hermione might be the one. With her extensive research skills and vast knowledge of magic, she could have stumbled upon a way to remove the scar. She was always determined to help Harry, and this would be just another of her great contributions.
Odin's loss of his eye was a significant act. He did it to gain profound wisdom and insights. This sacrifice was part of his journey to become a more powerful and knowing deity.
Aang could have figured out how Zuko got his scar by encountering someone who witnessed the event and was willing to share the details. Or perhaps Aang saw a vision or dream that gave him the clues he needed to piece it together.
Another reason could be related to his personal growth. He might be trying to master the power of the eye in private. Naruto has always been one to face challenges alone at first. By hiding his eye, he can focus on understanding and using its power without distractions or the pressure of others' expectations.
Perhaps he got into a fight with a new, powerful monster that emerged after the main events. These new creatures could be more dangerous and leave a mark on him.
One consequence could be that his friends might start to suspect him. Since Naruto is usually an open book, hiding something as significant as his eye could make them wonder what he's up to.