In terms of Medical Ninjutsu, Tsunade believed herself to be unparalleled in the Medical Ninjutsu Shinobi World; no one could rival her in this area. However, she was not particularly skilled in research.
Kushina wasn't particularly skilled at studying Ninjutsu, let alone special physical characteristics. So the two of them struggled for a long time, and although they managed to completely remove all the teeth marks from Karin's body, they were still unable to develop her physical characteristics.
Tsunade taught Karin Medical Ninjutsu, but the results were mediocre. Karin seemed to be good at sensory perception, not medical skills; her medical skills were only due to her special constitution.
On the contrary, Kushina learned the Sealing Jutsu taught by Karin very quickly, after all, she possessed the physique of the Uzumaki Clan and had the bloodline power of the Uzumaki Clan hidden within her.
During this process, Uya also joined in with great interest, directly completing the First Stage and Second Stage of the Sage Body transformation on Karin Uzumaki.
This surprised Uya quite a bit. She seemed to be even better than Kushina in terms of modifying her Sage Body, perhaps because of her special physique?
Although she was a few years younger than Haku and Kimimaro, her strength was close behind, and she quickly caught up with Kimimaro and Haku. In terms of strength, Kimimaro was the strongest, followed by Karin, and then Haku.
Of course, this doesn't mean Bai is weak, but rather that Bai's personality is too kind, and he rarely uses fierce or deadly attacks.
However, that's alright. In terms of offense, Kimimaro is undoubtedly the strongest. Haku isn't interested in offense, but he puts most of his energy into defense, making him a very good match for Kimimaro.
With the addition of Karin, the trio's teamwork became even more perfect: one for offense, one for defense, and one for support—a near-perfect trio.
Uya was also trying to study Karin's physique, wanting to help her develop that special physique, but this was even more difficult than helping her continue to evolve her Sage Body.
After all, Uya can't really be said to be good at research; it's just that Uya's thinking isn't limited to this world, and he dares to try new things in all sorts of ways.
If we're talking about research, who's the most skilled? Without a doubt, there's only one person: Orochimaru.
Of course, Uya wouldn't hand Karin over to Orochimaru for research. Although Uya didn't acknowledge Karin as his disciple, after deducing based on blood relations, he concluded that she should be Kushina's niece.
This is quite normal, as the Uzumaki Clan is composed of people with varying degrees of blood ties. As a result, Kushina directly recognized Karin as her niece, Karin naturally agreed without hesitation.
Kushina would be the first to object to giving Karin to Orochimaru for research. Even though Orochimaru is now very strong, having transplanted Hashirama Cells, gained the Mangekyō Sharingan, and offset the side effects, he is still no match for Kushina.
Under the Six Paths, it would be difficult for anyone to defeat Kushina. After all, Kushina's Sage Body was almost complete, just one step away from being fully perfected. In the history of ninjas, only two people are known to have obtained the Sage Body: himself and Uya Hashirama Senju.
However, it's impossible to hand Karin over to Orochimaru for research, but extracting some blood and cells, as well as collecting some Chakra, is no problem at all.
Otogakure.
This is the village established by Orochimaru, where he conducts all sorts of experiments, trains ninjas, and selects materials that can be used for the Living Corpse Reincarnation.
The entire village's ninjas were basically brainwashed by Orochimaru, and were extremely loyal and fanatical to Orochimaru.
Inside the laboratory in the Otogakure, Orochimaru wore a thoughtful expression, a hint of interest flashing across his face.
"Is that so? That's a very special constitution. That's quite interesting."
Standing quietly in front of Orochimaru, Uya casually recounted Karin's situation to Orochimaru.
"If I could study her more thoroughly, perhaps I could get a satisfactory answer."
Orochimaru listened and nodded slightly. Of course Uya, he couldn't refuse Uya's request, nor did he dare to.
Uya shook his head and said calmly, "I can't give you the person. Here are some blood samples and some Chakra."
"In that case, the research will be much more complicated..." Orochimaru took the storage scroll handed to him by Uya, raised an eyebrow slightly, as if sensing the air temperature drop a few degrees, and immediately said seriously, "However, it can still be done."
"That's good."
Uya nodded casually.
Tsunade and Kushina tried for a long time without success, and even though Uya helped Karin complete the two stages of the Sage Body transformation, he was still unable to unlock her power.
Kushina was naturally unwilling to see Karin get bitten just because she wanted to help someone heal; it was simply a bizarre method. After her research failed, she thought of Orochimaru and asked Uya to ask Orochimaru for help.
Uya naturally wouldn't refuse Kushina's request, so he went to the Otogakure.
After giving Karin's blood and Chakra to Orochimaru, Uya didn't plan to linger in Orochimaru's laboratory, which was filled with all sorts of strange and unusual things.
In any case, this kind of research will not yield results in a short period of time. Developing a physique and then developing special Ninjutsu based on that physique cannot be accomplished overnight.
Just as Uya was about to leave, a voice suddenly came from outside the door.
" Lord Orochimaru, this is a new experimental sample, please take a look..."
Kabuto Yakushi, wearing glasses, walked in, he immediately caught sight of Uya, his tone faltered, and his pupils contracted sharply.
This is Lord Orochimaru's most secret laboratory; only he and Orochimaru are allowed here. When did this white-haired boy sneak in?!
Moreover, this person...
A flash of insight struck Dou's mind, and he instantly realized Uya's identity, revealing an even more shocked expression.
However, his reaction was very quick; he hesitated for only a moment before bowing deeply to Uya.
"Greetings, Lord Uya!"
The fact that he could appear silently in Orochimaru's most secret laboratory without anyone noticing, not even Orochimaru himself, coupled with his appearance, made Kabuto almost 100% certain that the person in front of him was the God of the Shinobi World, Uya.
He dared not show the slightest disrespect to Uya. He had collected information on Uya and was fully aware of Uya's strength, which was absolutely beyond his ability to contend with. Even Orochimaru would have to bow down before Uya! (To be continued.)