Aizen is a practical person.
After hearing what Arima said, he immediately became very interested.
He temporarily put down the work at hand and instead began to try to put the Quincy who had lost his power into a state of physical and mental extremes.
For Aizen, it was not too difficult to do such a thing.
In a short period of time, he thought of many ways to get the other party to reach this state.
As for the arrow condensed with spirit, this was not something difficult to achieve.
Although Shinigami do not have the Quincy's ability to manipulate and gather spirit particles, after Arima's Zanpakutō was liberated, he had abilities similar to those of the Quincy. He could manipulate and control the spirits unscrupulously.
Using this method, he condensed a spiritual arrow.
On this day, under the watchful eyes of Aizen and Arima, when they pierced the heart of the Quincy who had lost his power and was constantly tortured by Aizen into a dual mental and physical state, a miracle happened.
It was like opening a valve.
The lost power of this Quincy quickly spurted out from his heart.
Even if Aizen didn't study the other person's blood, the aura emerging from the other person's body was enough.
Aizen knew that the other party had restored their power.
"It's really, really incredible," Aizen murmured to himself in shock.
Then he quickly came to his senses, picked up the notebook, and swiftly recorded the data of this experiment in response to the monitoring instrument on the side.
After this experiment, the Quincy who regained his power did not gain freedom but became extremely valuable research material for Arima and Aizen.
Through many studies, Arima and Aizen came to a conclusion that had never been reached before.
Although the Quincy's power comes from blood, its root is... the heart.
After using the Spirit-Spreading Glove, the Quincy loses all their power, but what they actually lose is the power in their blood. If the valve in the heart can be stimulated through some means, the power of the Quincy can be regenerated.
The difference between Quincy and ordinary humans lies in... the heart.
The heart is the source of their power.
Time passed quietly.
After the Shinigami took the initiative to cease war with the Quincy, Seireitei returned to a calm state.
In this state, Arima and Aizen secretly hid in a laboratory in the broken world, constantly researching the Quincy.
In addition to the group of living pure-blood Quincy captured by Arima and several members of the Star Cross Knights, Aizen also quietly collected the remains of many Quincy during the war.
There were pure-blooded ones and mixed-blooded ones.
Although they were all dead, their bodies could still help Arima and Aizen study the Quincy better.
As a race that once competed with the Shinigami, even though the Quincy were now in decline, it was undeniable that they possessed terrifying abilities.
Just this kind of ability was worthy of analysis, not to mention that Arima revealed the secret that they were the descendants of the Soul King.
Arima traveled to this world after the war of that year.
Therefore, he did not experience the war with the Quincy firsthand.
Most of his understanding of the Quincy came from the plot of the original work.
Other than that, he didn't know much about them.
During the research process with Aizen, more secrets belonging to the Quincy were unearthed, and their understanding of the Quincy became more and more profound.
It was also at this time that some changes occurred in Gotei 13.
The captain of the Fifth Division died in battle.
Vice-captain Hirako Shinji passed the captain assessment and became the new captain of the Fifth Division.
After he became captain, his first appointment was surprising.
He appointed Chief Officer Aizen Sōsuke as the new vice-captain of the Fifth Division.
It should be noted that although Aizen performed well in the war with the Quincy, his seat in the Fifth Division had improved significantly, and he had become the Fifth Seat. However, the vice-captain position should have logically gone to one of the top three seats.
As a result, no one expected Hirako Shinji to appoint Aizen as vice-captain.
Fortunately, Aizen had always been very popular in the Fifth Division, and no matter what he did, he could complete it properly.
His promotion to vice-captain did not cause much criticism.
On the other hand, Aizen was not too excited after becoming the vice-captain.
For him, as a chief officer, he could hide himself better.
As vice-captain, although his status was higher, he needed to assist the captain in handling many team affairs. This meant that his free time would be reduced and it would take up a lot of his research time.
Arima had another opinion on this.
"Hirako Shinji, although he looks ugly, is a very perceptive person."
"I'm afraid he realized that you are unusual and became wary of you, so he appointed you as his vice-captain to always keep you under his nose and monitor you."
"Master, why do you say this?" Aizen raised his head and looked at Arima, wondering why he had said such a thing.
Arima showed a mysterious smile without explanation.
Could he say that Hirako Shinji was wary of Aizen because his Zanpakutō was very similar to Aizen's, and both had main abilities that influenced the five senses of others?
Because of the similarity, Hirako Shinji instinctively noticed something was wrong with Aizen.
Because of instinct, he was wary of Aizen.
However, it was also because he did not know the reality of Aizen's Zanpakutō that he fell into Aizen's plan step by step.
"I have something to do today. You should go and study in the World of the Living. If you find anything, just let me know."
Arima said something to Aizen and left the room.
Aizen nodded.
Then he entered the spirit space in Arima's room, passed through the small boundary door, and stepped into the broken world alone.
Seireitei, commercial street.
Today was the annual flower festival.
All kinds of beautiful, fresh flowers were brought out by merchants and placed at the doors of shops.
A gentle figure wearing a captain's haori stood quietly at the entrance of the commercial street.
When Arima arrived, he saw Unohana Retsu, and then the two of them walked toward the commercial street.
On the way, they aroused the curiosity of many people.
After all, many people knew Unohana Retsu, the captain of the Fourth Division.
The man next to her seemed a bit unfamiliar.
But both Arima and Unohana Retsu ignored the looks of others.
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