Although it was a bit disappointing that he didn't achieved everything in one go, he is still prepared for the Yin chakra. It might just need a little more time.
The data available from the lab is limited. More detailed information will come from continued exploration in actual combat.
But, for now, this level of enhancement is sufficient for Aoba. He has completely overcome the weaknesses of chakra insufficiency, stamina shortages, and inadequate recovery that plagued him as a civilian ninja.
Now, combined with Sage Mode, he's reached a level where he can contend with high-level combatants in the ninja world.
But even this is far from enough. This level of power might be adequate for the next two years, but beyond that, it won't suffice.
In reality, for the next few years, without confronting Nagato or Obito directly, no one in the ninja world can match Nagato's Rinnegan in a direct confrontation.
As for Obito, while Aoba knows his intelligence, he doesn't have the Flying Thunder God technique. Even if he did, he wouldn't be able to handle Obito without the fourth Hokage's mastery of the second stage of the technique.
The Akatsuki is currently in a period of accumulation and lurking. There's no immediate danger of direct confrontation. However, Obito still occasionally visits Konoha.
Especially since he had captured a White Zetsu, this could attract Obito's attention.
Fortunately, Aoba hadn't noticed Obito's presence for several months, which gave him some relief. It seems that Obito is still occupied with manipulating the Mizukage and tormenting the Mist Village. In the plot, this village, responsible for Rin's death, was nearly ruined by Obito.
Aoba's success also seemed to have stimulated Yumi, who has repeatedly suggested trying the procedure on herself.
However, he had reservations. Yumi cannot use Sage Mode, making the risk of transplanting Hashirama's cells quite high.
But without the transplant, her time was running out.
This is unknown to Karin, but both Yumi and Aoba are well aware of that fact. Especially Aoba, knew even better than Yumi. He was performing checks on Yumi every three days.
According to his checks, she now has about six months left to live. But it wasn't apparent on the outside due to the life-sustaining medicine Aoba has provided.
Unfortunately the life-sustaining medicine only treated the symptoms, not the root cause. It could heal external wounds but was powerless against Yumi's fundamental deterioration.
Thus, the only hope now was Hashirama's cells. After all, Hashirama's cells could fundamentally reconstruct Yumi's body, potentially restoring her vitality.
"You've thought this through, Yumi. But this doesn't just affect you. Karin has the right to know."
It was one of the reasons they both hesitated on proceeding forward. The potential outcome was too heartbreaking for Karin, who is still just a young girl adapting to a new life.
She now had a family, a mother, and friends. Her life is joyful and telling her it was about to end would be quite cruel.
He didn't press the matter further but left the decision to Yumi.
The next morning, he noticed that Karin wasn't at school. He realized that Yumi must have made a decision at the memorial.
"Have you made up your mind?"
"Yes, I am clear on everything now. I've told Karin everything. Now, I must face my fate."
"Alright. I'll inform Kakashi to come as the assistant."
Originally, Yumi was supposed to be his surgical assistant. Now, with Yumi as the patient, he had to call Kakashi in as the replacement.
"You're transplanting Hashirama's cells into Yumi?"
Kakashi was shocked.
"Do you know what you're doing? Those are the First Hokage's cells. Do you understand..."
Kakashi was a bit agitated. He could barely understand Aoba's desire for self-enhancement, but he couldn't grasp why Aoba would do this to someone close to him. Aoba had already informed him.
Given all conditions, the success rate of the transplant is around seventy percent. But Yumi is not even a ninja. She has just recently started harnessing chakra. Therefore, her success rate might be less than fifty percent.
"What are you thinking? Creating a Wood Release army to unify..."
"Kakashi, Yumi is dying," Aoba said casually, leaving Kakashi stunned.
"...What do you mean?"
"Literally what I said. Yumi and Karin are members of the Uzumaki clan. Sometimes, this clan has a special constitution where, once the body is injured, life force leaks out.
In other words, if someone gets injured and bites them, their wounds heal rapidly."
Kakashi was not naïve. Having carried out countless dark missions in the ANBU, he had seen many dark sides of the ninja world. He immediately thought that if such a constitution was discovered by outsiders, it would be a disaster for Karin and her mother.
"Where did you find them?" Kakashi already had an idea.
"In the Grass Village."
"...A year ago, the Grass Village had a negotiation with Konoha. Some of their ninjas died at the border between the Land of Fire and the Land of Grass, requesting assistance from the Land of Fire. But it ended up going nowhere.
Considering the time, you must have brought them back during that period. So, you didn't rescue them from mountain bandits. You took them from the Land of Grass. You're the one who killed those Grass ninjas."
"Correct."
Kakashi initially thought that the Grass Village and Konoha were allies, but after some reflection, he kept quiet. He had visited the Grass Village and knew well the nature of its ninjas.
"Yumi's body was there..."
"Yes, both Yumi and Karin. There, they were treated worse than dogs. They were just two pieces of rotten meat, easy for anyone to bite. Yumi's body is failing because her life force has leaked too much."
For more than a year, I have used various methods, but they only address the symptoms, not the root cause. On the surface, she seems fine, but in reality, she has less than six months to live."
"..." Kakashi was silent. He couldn't imagine the cheerful, mischievous little girl Karin had gone through such a horrific experience. He also couldn't fathom what Yumi had endured over the years.
"Does Karin know this?"
"Yumi has told her. It's their mutual choice. Yumi... has been fighting hard to live."
This time, Kakashi fell into true silence. After a long pause, he finally spoke.
"When does the surgery start?"
"As soon as we have the assistant."
"Alright, let's go."
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Currently on Chapter 88 - Total Domination