Sasuke Uchiha

Sasuke Uchiha (Uchiha Sasuke) is one of the last surviving members of Konohagakure's Uchiha clan. He became a shinobi so he could someday grow strong enough to exact revenge against his older brother, Itachi, who had slaughtered their entire clan. Initially a member of Konoha's Team 7, Sasuke defected from the village to obtain power from Orochimaru, and later also joined Akatsuki, becoming an international criminal in the process. He later proves instrumental in ending the Fourth Shinobi World War, redeeming himself and his family name.

After receiving the Six Paths Chakra, Sasuke's left Sharingan evolved into a Rinnegan. Unlike Hagoromo's, his Rinnegan has a secondary state that has six tomoe around the eye, representing its full power. When drained of its power, Sasuke's Rinnegan cannot access this state for an extended period of time, until after its restoration, likewise affecting his Mangekyō Sharingan. As a true wielder, Sasuke can deactivate his Rinnegan at will, though, this was only after two years of mastering it. As a result, using the Rinnegan repeatedly seems to require Sasuke to close his eye to recharge (or at least speed it up), although it doesn't seem to exhaust him due to his massive reserves. Over-usage will begin straining him, as seen in his final battle with Naruto and it had to keep it closed for the remainder of the battle. Though his Rinnegan manifested only in one eye, its power is still on par with its dual variant.

After Sasuke returned to the village at some point, he married Sakura. He has an illegitimate daughter with Karin named Sarada, essentially beginning the Uchiha's restoration — although it's unknown if Sarada was born before or after Sasuke married Sakura. After this, he called for a meeting with all the five Kage and told them he had been doing research and found possible evidence an army of White Zetsu as well as something even worse than Kaguya may be on the way. This information was decided to be best kept from the public as they were still recovering from the Fourth Shinobi World War. Sasuke then took the liberty of tracking traces of Kaguya's chakra, being the only one that can with his Rinnegan and left the village as a top-secret mission. While walking through a forest one day, he thought he heard a sound behind him. Instinctively putting his hand to his blade, Sasuke dismissed it as his imagination and continued walking.