Yakumo's confusion indirectly showed just how tightly Shinji had kept the "Rinnegan Project" under wraps. Even the members of his own organization knew nothing about the Rinnegan's creation.
During class, Shinji kept an eye on Karin.
Perhaps because Karin was the original owner of this newly awakened Rinnegan, there was no rejection reaction. Nothing unusual happened to her throughout the day.
By the time school let out in the evening, Shinji had finally breathed a sigh of relief.
According to Naobi's feedback, although Karin had awakened the Rinnegan just last night, her Dojutsu was still slowly growing stronger.
Clearly, after Karin had expended a large amount of Chakra to awaken the Rinnegan, it had begun to gradually repay her, subtly improving her Chakra and physical constitution.
Karin had now reached the threshold of Six Paths level with one foot.
In the current Shinobi World, apart from the Sage of Six Paths, who existed in the Pure Land as a soul; Otsutsuki Toneri, who controlled the Giant Tenseigan on the moon; and Jigen (Ōtsutsuki Isshiki), who was hiding in the shadows, along with the other true Otsutsuki, perhaps only Nagato, who also possessed the Rinnegan, was stronger than Karin.
That was because, when Nagato received the transplanted Rinnegan, he had also inherited the full power of Madara Uchiha's eyes, as well as his contract creature, the Demonic Statue of the Outer Path!
Madara Uchiha was the reincarnation of Ōtsutsuki Indra before Sasuke. He had been one of the strongest of his era, surpassed only slightly by the First Hokage, the reincarnation of his contemporary, Ōtsutsuki Ashura. So the power of his Rinnegan was most likely greater than that of Karin's.
Add the Demonic Statue of the Outer Path, the Ten-Tails' husk, to Nagato's arsenal, and there was no doubt he was