Naruto: Journey Of The Strongest Teacher

General POV

"Maybe I can be of help?" asked an amused voice from behind.

Karin turned around to see a famous man with blue hair looking at her with a smile.

"Ishizu-sensei!" shouted Karin as she jumped at him, surprising the rogue-nin by the friendliness the girl carried towards him.

"Whoa there Karin! I don't think you should do that to a rogue Shinobi like me," spoke Ishizu with a smile.

Karin buried her face in Ishizu's body.

"Do you know I have felt your chakra? You would never betray us. I know you are still the same person I saw the first time in the Forest of Death."

Ishizu has a small smile on his face as he patted Karin's hair.

"Well, you found it out."

Karin took a breath.

"I am just too smart. Well, I can't say that about Naruto."

"That's because of our connection, Karin. Right now Naruto's emotions are in turmoil. He cannot look beneath the underneath and doesn't know my reason for doing it. Still, I never thought he would come here. Shouldn't he finish his Sage Mode training?"

"Well, Fukasuke-sama wanted Naruto to go to their place, but he refused. After I told him about Uzo, he changed from sulking to active again. He didn't tell me exactly why he wanted to come here again. Only that he didn't want to rely on what he called 'Plot Armor'."

Ishizu failed to suppress his cringe.

"I never thought he took that so serious. Either way, I didn't come here to see Naruto but found you. You are here to learn about the Rinnegan, right?" asked Ishizu, to which Karin nodded.

"Then I am the best teacher to have."

Ishizu activated his Rinnegan.

"Let's start with a bit of history first. There are only 3 people who have ever possessed the Rinnegan. I bet you have read some ancient books that mentioned the Sage, Hagoromo Otsutsuki. We don't want to make this too complicated, so we just say he was the first who had it. His sons didn't inherit the Rinnegan. Instead, the power was split between his two sons, Indra and Asura.

The Sharingan and the Wood Style. The chakra between the two sons didn't disappear after they died but reincarnated in two others.

The second individual who acquired the Rinnegan was Madara Uchiha. During the fight between him and his rival Hashirama Senju, Madara bit some flesh out from Hashirama."

Then Ishizu looked at Karin.

"What I am going to tell you is something only a few know. I hope you don't tell anyone or many people could die. I hope you understand, Karin."

Karin nodded quickly. The history lesson was amazing, and she didn't want Ishizu to stop.

"Unlike in the textbooks, Madara didn't die in his battle with Hashirama."

"Wait, he survived?" asked Karin. She had read the books about the time of Hashirama and Madara. Everyone knew that Madara Uchiha died at the hands of the First Hokage.

"Sometimes even books cannot tell the truth. Uchiha's are known to cheat death in many ways. Madra used a special Jutsu to bring himself back to life. In secret, he fused the chakra of him and Hashirama who at that time were the reincarnations of Indra and Asura."

"And by combining the two chakras together, Madara gained the chakra of the Sage," stated Karin.

"Good, you can connect the dots, but it took Madara decades to fuse the two chakras, since the use of his jutsu had been paid. He aged heavily before he got it.

Using the Rinnegan, Madara lived up until the end of the 3rd Shinobi War. Before that, he saw that with his current age he couldn't change the world anymore, so he took his Rinnegan out and put it into a child. But not a normal child. One that could bear the chakra demand and had a long lifespan. An Uzumaki."

Karin's eyes widened.

"So this Pain is an Uzumaki and had the Rinnegan from Madara?"

"That is the truth."

"But how can you have the Rinnegan, Ishizu-Sensei? You must have done the same as Madara."

"Correct. The reincarnation cycle of Indra and Asura began once again after Madara died. Naruto is Asura's reincarnation and Sasuke is Indra's. With their help, I fused both chakras to obtain it."

Ishizu saw that Karin was discussing something with herself about something.

"I-I want to know why you do everything. I don't want to be left in the dark," spoke Karin, with a glare in her eyes that wished to seek knowledge.

Ishizu saw the determination in Karin's eyes.

"I could show you what I know, but the price you'd have to pay would be immense. Do you really want to make such a deal?" asked Ishizu.

Karin smiled.

"You are known as The Strategist and I doubt you will harm Konoha. So yes, I will do everything to learn."

Ishizu nodded before sitting down.

"Come, Karin, sit."

Karin sat down across from Ishizu.

"Your ability to see into one is quite good, but I will show you a technique that is as old as the Sage. He was the one who created it. It is the precursor of Ninjutsu, Ninshu."

Karin starred in her eyes. She wanted to know and Ishizu would show her.

"Ninshu. That sounds awesome."

"Now, close your eyes and stretch your hand out and make a fist."

Karin did as instructed before she felt Ishizu's fist on her.

"Feel my chakra and let it flow through your chakra system. We will connect on a level no two people can."

Karin felt the sensation of Ishizu's chakra entering her body and circulating inside while he let her chakra fly into him.

Then she saw it. The same woman she saw before. Ishizu's soul revealed the name she back then heard. Kaguya Otsutsuki, the mother of the Sage of the Six Paths. The mother of all chakra. She saw everything.

The contact broke, and Karin opens her eyes.

"So, how was the information?" asked Ishizu.

"Amazing. I could go on forever."

Then Ishizu felt a hug.

"Why?"

"I knew you could leave me in the Forest and I would be Orochimaru's slave. I thank you again for the life you gave me."

"No problem."

"So what are we going to do now?" Karin broke away and smiled at Ishizu.

Ishizu signaled Karin to open her mouth before placing a seal on her tongue.

"A Fuinjutsu to prevent you from feeling anyone about what you saw. You have learned too much and I don't want anyone to know. For now. You can have it only for yourself. That is only for safety. There is another thing."

"You want my Uzumaki chains, right?" Karin saw what Ishizu wanted her to do.

"You saw what I am going to do. I don't want to mess it up, so I want you to l use the time here and learn. Maybe find Naruto or the other two girls who are here with me. When the time is right, I will call you and I hope you will heed it."

Karin nodded.

"I will don't worry."

Both departed and were going opposite ways.