Konoha Medical Department, Biological Research Team Office.
Unlike ordinary squad leaders, Aizen now had a private office. He sat there, silently refining chakra.
Aizen's attire remained unchanged - a black death god-like training outfit, a three-seven hairstyle, and black-rimmed glasses.
However, the most noticeable change in the fourteen-year-old Aizen was his sudden growth spurt.
Two years ago, when he had first entered the Second Shinobi World War battlefield, he could barely be considered a teenager. But now, Aizen was undeniably a handsome young man.
This transformation wasn't just in height, but also in appearance. He had always inherited his parents' good looks, but his youthfulness had given him a cute, somewhat immature air.
Now, however, the contours of his face had sharpened, revealing an extraordinary handsomeness. Many female ninjas in the medical department, who previously saw him as a mascot, now looked at him with a mix of warmth and shyness.
"Phew!"
The chakra aura around Aizen stabilized, and his overall demeanor shifted significantly.
He opened his eyes, a glint in them.
"I've finally reached Jonin level. This increased power isn't bad." Aizen nodded in satisfaction, feeling the surge of chakra within him.
For an all-around explosive ninja like Aizen, every advancement in rank signified a leap in strength.
After being promoted to Jonin, Aizen just needed a few more days to elevate the natural energy in his soul to the Jonin level, then reacquaint himself with and control his other abilities.
At that point, Aizen's strength would undergo a qualitative transformation.
It's worth noting that while Aizen's swordsmanship remained at the sword master level, it had reached the realm of mastery. He could instantly condense one-fifth of his own power into a single point, making for an extremely terrifying attack.
According to Aizen's estimation, this move was comparable to a top-tier S-rank offensive ninjutsu. The drawback was its limited usage, making it a last resort.
As for Shunpo, Aizen had indeed elevated it to the level of mastery.
However, this technique also consumed a considerable amount of energy, requiring Aizen to use it cautiously.
Eight Inner Gates.
Despite possessing the Senju bloodline, utilizing the Eight Inner Gates took its toll on Aizen's body. Opening the first five gates resulted in a feeling of weakness, while opening the sixth gate caused further strain and potential long-term damage.
Therefore, Aizen exercised extreme caution with the Eight Inner Gates. He would never open the later gates unless facing a life-or-death situation.
Fortunately, the Eight Inner Gates technique scaled with the user's strength. Even with only the first five gates open, it provided Aizen with a significant boost in power.
As for the changes in his spiritual network, apart from further expanding his perception range to a kilometer, there wasn't much else to note.
Reiatsu, swordsmanship, Shunpo, and the spiritual network were Aizen's core abilities. The Eight Inner Gates and other escape and secret techniques were merely supplementary tools in his diverse arsenal.
Regarding Kidō.
Due to its high energy requirements, it could only be practiced using Reiatsu. However, Aizen didn't invest much effort into Kidō.
Whether in terms of offense or defense, Aizen's swordsmanship and Shunpo were more than sufficient to handle most situations. Why bother with flashy techniques when a single, decisive strike could achieve the same result?
Moreover, Kidō required incantations. In the ninja world, where sneak attacks and ambushes were common, this could be a fatal weakness.
While it was possible to use Kidō without incantations, this further weakened its effectiveness, making it even less appealing to Aizen.
Of course, some Kidō techniques, like Black Coffin and Hado #90, were visually impressive and tempting to Aizen. However, the immense Reiatsu they required made him reconsider.
In the end, Aizen reluctantly abandoned the idea of mastering Kidō.
Among the lower-level Kidō, there were indeed some less powerful but highly practical techniques. For instance, the Binding Spell "Seki" from the Bakudō category was a fascinating one.
Therefore, Aizen selectively studied a few practical or unique Kidō techniques to diversify his repertoire.
In summary, after taking the time to fully master his powers, Aizen would undoubtedly be able to rival peak-level Jonin in a short period. He would be nearly on par with Orochimaru and the others from the late Second Shinobi World War.
Aizen was pleased with this progress. He had essentially achieved the combat power of a top-tier ninja, albeit with less endurance.
He had never dared to dream of such a meteoric rise to the pinnacle of the ninja world. After all, he had always been a pragmatic individual.
After briefly adjusting his state, Aizen stood up and stretched. He then left his office, heading towards the location of Hiruko's detachment.
"Good morning, Captain Aizen!"
"Aizen-kun, are you free tonight? Would you like to have dinner with me?"
"Captain Aizen, could you share your experiences from the Second Shinobi World War? Everyone would love to hear them!"
Along the way, many female ninjas from the medical department, both shy and bold, greeted Aizen with flirtatious remarks.
This was the trouble with being too handsome.
After finally extricating himself from the group of admirers, Aizen reached Hiruko's team and inquired about her whereabouts from a blushing young woman.
"Oh, so Captain Hiruko still hasn't returned, even after several days?" Aizen chuckled.
"Mmm-hmm..." The woman nodded absentmindedly, captivated by Aizen's charm.
"I see."
Having received the answer he sought, Aizen gave the woman a gentle smile and turned to leave, noticing her slightly dazed expression.
However, the moment he turned, a sly grin spread across his face.
After spending several days raising his natural energy to the Jonin level and integrating his other abilities, Aizen was finally ready to act.
The first step in his long-awaited grand plan was to bring Hiruko under his control.
...
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