The Yamanaka Clan's historical records are numerous and varied, making it impossible to read them all without three to five years. Ino didn't have that much time, so she mostly just skimmed through the records after the First and Third Hokages.
Inoichi, wanting to communicate more with his daughter, would deliberately tell her interesting anecdotes when he saw her interest in history.
To maintain her persona as a twelve-year-old girl and avoid too much divergence from the original Ino, Ino would ask Inoichi some rather headache-inducing questions during their chats, such as "How many girlfriends did the Six Paths Sage have?" or "Did the Third Clan Head marry the Flower Goddess?"
She read during the day when Yang energy was strong and practiced the Mind Body Switch during the night when Yin energy was most concentrated.
After using the Mind Body Switch Technique on the poor little deer borrowed from the Nara Clan about ten times, Ino had pretty much mastered this Secret Technique.
A clear change appeared on the pentagon pattern on the right side of her status panel. In the middle of Fire, Wind, Lightning, Earth, and Water, the "Yin" character, which was previously shrouded in mist, had now solidified.
This indicated that Ino had initially acquired Yin Style Chakra among the seven Chakra natures.
Strictly speaking, this should be called Chakra Nature Transformation—Wind Release Chakra Nature Transformation, Yin Style Chakra Nature Transformation, and so on. However, it's often abbreviated to Chakra nature, which is not precise terminology, but the meaning is the same.
Ino's Ninjutsu knowledge had become very extensive through a lot of study.
She now had a general understanding of Yin Release and Yang Release natures, as well as Yin-Yang Release and Yin-Yang Power.
Yin-Yang Release was too high-level; it was an advanced ability developed by the Six Paths Sage combining Yin Release and Yang Release, somewhat like how Earth Release plus Water Release becomes Wood Release, but Yin-Yang Release was much, much higher in level than Wood Release.
Naruto received Yin-Yang Release Chakra bestowed by the Six Paths Sage, which saved Might Guy's life and restored one of Kakashi's eyes. This ability didn't belong to him; that portion of Chakra diminished with use. Naruto had already lost his Yin-Yang Release ability when he lost his arm, and could only recover using Hashirama cells.
Currently, only the Six Paths Sage possesses the Yin-Yang Release ability.
Ino viewed the Yin-Yang Power, which placed a moon on Sasuke's left hand and a sun on Naruto's right hand, as simpler: it was the sealing jutsu for Ōtsutsuki Kaguya.
Black Zetsu, you jump back and forth, stirring up trouble for millennia, calculating every move, while I, the Six Paths Sage, observe in secret, smiling silently, quietly developing a jutsu. No need to understand the principle, just a fool-proof operation, left hand, right hand, a slow motion, a one-second seal, turning your thousand years of effort into smoke. This was the Mother's Day gift the filial son, Six Paths Sage, prepared for his dear mother.
Aside from this function, Yin-Yang Power had no other use.
Yin Release and Yang Release are very common. Genjutsu, the Yamanaka Clan's Secret Technique, and the Nara Clan's Secret Technique all fall under the Yin Release category, while Medical Ninjutsu and the Akimichi Clan's Secret Technique fall under the Yang Release category.
Many Ninja possess Yin Release and Yang Release natures, but they are easy to learn and difficult to master. Ino looked at the black-on-white "Yin" character on her status panel and then at her skill points.
Chakra paper tests showed that Ino's body was very suitable for using Water Release Chakra, which could be considered her initial Chakra nature.
Possessing an initial nature does not mean one can use the corresponding Ninjutsu. Iruka has both Fire and Earth natures, but he hasn't undergone Chakra Nature Transformation training, so he can't use any Five Nature Transformation Techniques.
Naruto's initial nature is Wind. If he wants to develop his Wind Release Chakra and use Wind Release, he must undergo arduous training.
If she invested skill points, Ino could now develop her Water Release Chakra and, after learning the corresponding Ninjutsu, use Water Release.
She thought about it, then asked Inoichi, and finally decided to slowly develop her Water Release Chakra herself. She decided to use her precious skill points on Yin Release.
There is a lot of experience in developing Five Nature Transformation Techniques, which can be widely referenced.
Experience in developing Yin and Yang Release is extremely scarce, mostly held by various major clans. It's impossible for Ino to learn the Nara Clan's Secret Technique, nor is it realistic for her to learn Genjutsu. With the Four Crazy Laughers still active today, learning Genjutsu would definitely be a waste of time. Aside from these methods, it's very difficult to improve the Yin Release nature.
Ino's solution was to add points! Add to Yin Release!
One skill point was invested, and the originally black-on-white "Yin" character underwent a clear change. The character became more three-dimensional, and its color turned silver, with a slight shimmering effect upon closer inspection.
Ino secretly curled her lip. Could this be how the levels are divided, like silver, gold, platinum?
Despite her grumbling, the effect of adding points was immediate. Her temperament instantly became two points colder, her perception range doubled, her mental energy became extremely solidified, and her progress in learning the second stage of the Mind Body Disturbance Technique was so incredible that Inoichi found it hard to believe.
According to Inoichi's initial estimation, it would take his daughter at least three to five years to master the Mind Body Switch Technique and Mind Body Disturbance Technique. But now? He estimated it would take about three months.
His daughter's talent in Yin Release was far higher than he had anticipated, and for a moment, he felt a bit disoriented.
A month later, Ino returned to school after a long absence.
She could continue to cultivate at home, but she was severely lacking in skill points, the kind that was truly lacking, with too many areas needing points, so she had to go out and stir up some trouble.
"Ino , I heard you were sick?" Sakura's words made it impossible to discern her true thoughts.
Ino took out the thermos Rino had prepared for her, poured out a cup of incredibly viscous medicine, and then, without even looking, pinched her nose and numbly chugged it down.
With Yin Release upgraded to level two, her mental energy surged significantly, which also led to a slight increase in her Chakra. Coupled with various expensive medicinal ingredients she had consumed, after a month of intense training, her "Spirit" attribute also increased from 5 to 6.
This wasn't from adding points; half of this 1 attribute point increase was due to Yin Release, and the other half was from drinking medicine, which apparently cost a lot of money.
Ino now even burped with the smell of medicine.
She waved her hand: "I'm sick, stay away from me."
Sakura carefully scrutinized Ino, mainly her height.
Ino was already two centimeters taller than Sakura, and now, comparing them, she seemed to have grown even taller.
Most critically, there was that somewhat gloomy aura about her, filling Sakura with a sense of crisis.
Sasuke-kun always had a gloomy face; could he like people with this kind of cold demeanor? Sakura felt she had guessed Ino's scheme.
"Ino , I came in first on the test last week, and Sasuke-kun looked at me several times!" Sakura said proudly, hands behind her back, chin raised.
"Yes, yes, you're very impressive. Is there anything else? If not, hurry up and leave."
Sakura frowned, seemingly wanting to say more, but Ino's blunt attitude drove her away.
Busy! Ino was very busy now; she had no time to waste.