One unique concept could be a new form of jutsu that combines the power of the Sharingan with a green - themed chakra. Maybe it's a nature - based jutsu that only those with the green Sharingan can use.
In some Naruto Green Sharingan fanfictions, a unique concept could be that the Green Sharingan is a result of a rare genetic mutation combined with exposure to a special type of chakra. This makes the bearer of the Green Sharingan have abilities that are different from both normal Sharingan users and regular ninjas. For example, they might be able to see the flow of natural energy in a more detailed way, allowing them to better perform Sage Mode techniques. And also, their genjutsu could be related to nature, like creating illusions of a forest or a field of flowers to trap their opponents.
One interesting concept could be unique Sharingan abilities not seen in the original Naruto series. For example, a Sharingan that can not only predict movements but also manipulate time on a small scale.
One interesting concept could be a character having a blue Sharingan as a unique mutation. It might give them abilities different from the traditional red Sharingan in Naruto. For example, they could have enhanced precognition abilities, being able to see a few seconds further into the future in combat situations. This could make them a formidable opponent or a great ally.
One interesting concept could be a character from another universe getting the Sharingan. For example, a character from a modern - day setting suddenly having the power of the Sharingan. It would create a whole new dynamic as they learn to use it in a world without chakra.
One interesting concept could be the exploration of a character who once had the Sharingan but then lost it. Maybe the fanfiction delves into how they adapt to life without this powerful ability. For example, they might have to rely more on their other skills like taijutsu or ninjutsu in new and creative ways.
One interesting concept could be the exploration of new jutsu combinations using the Rinne Sharingan. For example, creating unique space - time ninjutsu that surpasses what we've seen in the original series. Another might be delving into the backstory of how the Rinne Sharingan came to be in a particular fanfiction's universe, perhaps it was the result of a long - forgotten experiment.
Well, one interesting concept could be the unique ways the Sharingan is used. Maybe the fanfic explores new jutsus or abilities related to it. For example, the author might create a situation where the Sharingan can not only copy moves but also enhance them in unexpected ways.
One interesting concept is the combination of powers. In fanfiction, often the Mangekyou Sharingan and Rinnegan abilities are merged in unique ways. For example, a character might be able to use Susanoo with the added space - time manipulation of the Rinnegan. Another concept is the backstories created for how characters obtain these powerful eyes. It could be through some long - lost family heritage or a strange encounter with a powerful entity. Also, the exploration of the psychological effects of having these eyes is fascinating. Characters may struggle with the newfound power and the moral implications that come with it.
Another concept is the character development. The presence of the Eternal Mangekyo Sharingan often brings a deeper level of conflict and growth for the characters. They might have to struggle with the power it bestows, such as the risk of going blind or the moral implications of using its more sinister abilities.
One unique concept could be Aphrodite bestowing Naruto with a new form that is related to beauty or charm, which he then uses in an unexpected way during a battle. For example, his new form might be able to disarm opponents by making them distracted with his enhanced attractiveness.
Well, in some 'Naruto Ruby Fanfiction', there's the idea of Ruby teaching Naruto and his friends about modern technology. This is quite unique as it brings a new element to the Naruto universe. Also, there are stories where Ruby's silver - eyed powers are related to some hidden jutsu in the Naruto world, which is a really creative and different take on both universes.