Well, one reason could be that it's a very powerful and complex ability. Writers might be intimidated by trying to incorporate it into their stories without making it overpowered or without fully understanding its mechanics. So, they tend to focus on more well - known and easier - to - write - about powers in Naruto.
Sakura could be an unexpected character to have the Sharingan. It would completely change her character dynamics. She could use it to enhance her medical ninjutsu, seeing the internal body structure more clearly. Also, she could become a more formidable fighter, using Sharingan - based genjutsu to her advantage.
In fanfiction, Naruto could get the Sharingan through a blood - related connection that is revealed later. For example, it could be discovered that he has some distant Uchiha ancestry that gets activated somehow. Maybe a powerful enemy's attack awakens this dormant Uchiha blood in him, and as a result, he develops the Sharingan. It could also be that a powerful sage or a new character uses their own unique powers to bestow the Sharingan upon Naruto for a specific purpose.
In a Highschool DxD OC and Sharingan fanfiction, you can incorporate the Sharingan powers in the story by making it a source of mystery and envy among the other characters. The OC could use the Sharingan's ability to enter the minds of others (a more advanced form) to gather information about the devils' plans. This would make the OC a valuable asset to their group. Also, the Sharingan could have a connection to some ancient prophecy in the Highschool DxD world, which would add more depth to the story and make the powers more significant in the overall plot.
Naruto might adapt by first trying to understand the basic functions of the Sharingan. He could start with the simple ability to see chakra flow more clearly. Since he has always been perceptive about people's emotions, he could use the Sharingan to read the emotions of his enemies through their chakra, which would help him in battles.
It could be Sasuke. In many Naruto - related stories, Sasuke has the Sharingan and is often the target of others' tricks or manipulations due to his complex personality and his power.
Well, relationships in Naruto Mangekyou Sharingan and Rinnegan fanfiction are often re - defined. When a character unlocks the power of these eyes, their friends may feel a sense of duty to protect them from those who would seek to harm them for their power. However, enemies may target the character's loved ones to get to them. Also, in some fanfictions, characters with these eyes may form a special bond with others who have a similar power or a connection to the origin of these eyes. This can create new alliances and rivalries within the Naruto universe.
The Sharingan in a Naruto fanfic can be a really interesting element. It often adds depth to the story. Writers can explore different aspects of it, like the unique powers of different levels of Sharingan, such as the Sharingan's ability to copy jutsus. It can also be used to show the character's growth. For example, a character might start with a single - tomoe Sharingan and progress to the Mangekyo Sharingan, which could be a significant plot point in the fanfic.
If Naruto had the Sharingan in fanfiction, it would likely lead to some interesting power - up scenarios. He could combine the power of the Sharingan with his own massive chakra reserves. This might make him an even more formidable opponent. His training would also take a new turn as he'd have to learn to control and master the Sharingan's abilities, like the different levels of the Sharingan and their unique powers.
One drawback could be the strain on his body. The Sharingan is a powerful dojutsu, and Naruto's body, which is used to his own chakra system, might not be able to handle it well at first. This could lead to fatigue and over - exertion during battles.