Jun only realized something very serious after meeting Nemu Kurotsuchi: in Nemu Kurotsuchi's timeline, she didn't fight Uryū, so she didn't install surveillance cameras on Uryū. Therefore, he had no way of knowing Aizen's plans, Soul Society wouldn't know about Aizen's plans. Karakura Town was going to suffer!
However, judging from Mayuri Kurotsuchi throwing Nemu Kurotsuchi to Jun's side, it's clear that Jun receives more attention from Mayuri Kurotsuchi than Aizen. But this isn't a problem; Jun doesn't care about being noticed by anyone.
The biggest difference between Jun and Aizen is that Aizen wanted to change everything single-handedly, while Jun relied on the prevailing trend, uniting all forces that could be united, and then using that force to act. By going with the flow, he could remain invincible.
However, speaking of Mayuri Kurotsuchi, let's talk about this guy. Although he seems freakish, one can't help but admire his intelligence.
In the original work, he planted Surveillance Bacteria on Uryū and then deduced Aizen's plans based on Uryū's observations in Hueco Mundo. Then, in his battle with the Eighth Espada Szayelaporro, he manipulated Szayelaporro from the very beginning. His goal was to test the drug— Superhuman Drug that could increase sensory speed by a thousand times.
Including his performance in the Thousand-Year War arc, this guy truly embodied the idea that knowledge is power, and in some ways, he was far more powerful than Jun.
Nemu Kurotsuchi, the seventh experimental subject of the Artificial Soul Reaper Project, and also the first successful experimental subject. The original version of the experiment was based on two technologies: Gigai and Mod Soul. With these two simple technologies, he ultimately created an experimental subject who could be called a true human.
It has to be said that this guy is incredibly capable. Purely in terms of scientific research ability, from the Soul Society Research Institute to the end of the story, he was the most outstanding inventor. The quantity and quality of his inventions far exceeded those of all the previous Twelfth Divisions, and his personal achievements far surpassed those of all the previous Twelfth Division Captains.
It's fair to say that aside from his eccentric appearance and behavior, if he were even slightly more serious and normal, the Zero Division would have opened its doors to him. It's truly a shame.
Returning to Chun's side, everyone is currently undergoing Hollowfication Mask Fusion, but whether they can complete it is anyone's guess; no one has succeeded yet. Soul Reaper's life is long, and the number of Heart Demons is enormous. To achieve a truly side-effect-free fusion, one must see through many of these Heart Demons, and this is undoubtedly extremely difficult.
Currently, the fastest progress is made by Ashido Kanō; this guy is a true brute, and his Heart Demons are very few. The progress of the Kuruyashiki is also encouraging. On the Visoreds' side, Hirako has completed the initial fusion and is currently eliminating his Heart Demons. Ōtoribashi, however, dares not undergo fusion, knowing his Heart Demons are very severe.
Jun has completed the initial fusion, a step he took without even needing Isuzu's help. However, in the process of exorcising his Heart Demons, Jun encountered a huge hurdle. The obstacle Jun initially thought might be his greatest obstacle had indeed come true: Isuzu's death was Jun's greatest and insurmountable Heart Demon.
Just how big is this Heart Demon? To make a comparison, the Heart Demons and chaotic entities in Ichigo's Inner World, if placed before us, would be only the size of a palm, with the largest piece being no more than half a body.
How big was Chun's Heart Demon? It was as big as a villa. When Chun herself saw this Heart Demon, she was completely bewildered. But retreating wasn't an option; she ultimately had to face it.
Jun and Isuzu entered the Inner World together. Upon seeing this enormous Heart Demon, Isuzu hugged Jun tightly.
"Idiot! Am I that important to you?"
Chun laughed out loud, "I don't know either, you know I don't understand love, but you're that important to me!"
Heart Demons to confess is truly brilliant! Even Jun herself was amazed by her own cleverness, really! From then on, Isuzu was completely devoted to Jun, and their relationship became even more harmonious and fulfilling than before.
After confronting this Heart Demon several times, Jun discovered that it had indeed Heart Demon, meaning that Jun herself was emerging from the shadows of her past. Jun then projected this process onto the other Visoreds, demonstrating that even such a formidable Heart Demon could be overcome and that there was no need for fear.
On the day of the screening, Rōjūrō Ōtoribashi completed the initial fusion, but subsequently encountered a huge problem when facing his Heart Demons. His Heart Demons were the hatred he harbored for Rōjūrō Ōtoribashi from years ago, and not only Aizen, but also a great hatred for Soul Society itself Aizen.
This hatred caused him to lose his temper and go berserk in his Hollowfication. Fortunately, there were five people in the villa —Kanō Miyabi, Kuruyashiki, Hirako, Hirako, Nel —whose fighting strength was equal to or greater than that of Rōjūrō Ōtoribashi. They forcibly suppressed him, shattered his Hollowfication Mask, and finally subdued him.
This was also the first time he had gone berserk in the face of his Heart Demons. It shows that people are different. Hirako naturally harbored a lot of hatred back then, but Hirako directly overcame his Heart Demons in that regard. He was very open-minded, but Rōjūrō Ōtoribashi was completely different.
Everything was progressing smoothly, and the data was transmitted back to the Endless Sea by Chun. The Endless Sea quickly responded, reporting that Sōya Azashiro's Heart Demons were escalating. He couldn't let go of the tragedy of his family's destruction, the murder of his sister before his eyes, and many other things. He simply couldn't accept it, and Chun was powerless to help him.
The scene shifts to Las Noches. Orihime's life there is relatively comfortable, unlike the chaotic and gloomy Las Noches depicted in the original work. In this timeline, however, Las Noches is somewhat lifeless and stagnant Las Noches.
Because the First Espada is Ulquiorra, a man devoid of emotion. The Las Noches under his rule is like a precise machine; anything imprecise is eliminated by him. Those overly eager Fracción from the original work can jump around in front of their own Espada, but to run off and act rashly is tantamount to suicide.
Because Ulquiorra, Grimmjow, Nnoitra, and Felix all hail from the Endless Sea and have a fairly good relationship with each other, if Fracción cause trouble and Ulquiorra wants to punish them, none of them, except for Grimmjow, will protect their subordinates. And Grimmjow doesn't have Fracción.
Baraggan is a very serious person. In the original work, his Fracción are very obedient. He and Ulquiorra have a very good relationship and are very compatible.
So, given the already huge power gap between the first 50 Espada and the last 5, and the fact that there's little conflict among the first 5, and the last 50 don't dare to act recklessly, what makes the Fracción think they'd dare to bully Orihime? Are they just asking for trouble?
Just like in the original work, Orihime lives in a separate palace. After Grimmjow returned to Las Noches with some injuries from his battle with Zaraki, he went to Orihime's palace.
"Hey, woman! Heal my wounds!"
Orihime had no choice but to activate her Sōten Kisshun to heal Grimmjow. Grimmjow, looking at this healing ability, was quite curious.
"Hehe~ This is really fun power! Just how far can this power go?"
Orihime shook her head. "I don't know either. The most I've ever healed was Soul Reaper who was on the verge of death."
"Is she about to die?" Grimmjow's words vanished as soon as they left his lips, then he suddenly reappeared, clutching a female Arrancar in his hand. He then sliced her in half at the waist, right in front of Orihime, and threw the severed Arrancar to Orihime, saying, "Save her."
"Are you insane!?" Orihime quickly activated her Sōten Kisshun to heal the Arrancar, her eyes filled with tears as she looked at Grimmjow, "How could you do this!?"
Grimmjow was a little angry. He grabbed Orihime's hand and yelled, "Stop!"
"No!" Orihime would never stop. She would never stop saving people, even if someone wanted to kill her. As long as she lived, she would not stop. This was her conviction, her kindness.
"I told you to stop!!" Grimmjow tightened his grip, Orihime's arm to throb with pain.
Orihime was in excruciating pain from being pinched, but she refused to give in and shouted even harder, "No!! I won't let the wounded in front of me go, ah~!"
Grimmjow snapped Orihime's hand and said coldly, "Stop!"
Orihime nearly had to discontinue treatment due to the excruciating pain, but she persevered. Despite being drenched in cold sweat, she refused to compromise. "I! No!"
Grimmjow was truly enraged, and just as he was about to crush Orihime's arm to pieces, Ulquiorra appeared.
"What are you doing?! Grimmjow!"
"Hmph! Playing a game, how boring," Grimmjow tossed aside Orihime's hand, stood up, put his hands in his pockets, and left.
Ulquiorra walked over and noticed the unusual condition of Orihime's hand. He picked up Orihime's severed hand, and Orihime bit her lip in pain.
Ulquiorra glanced at the female Arrancar being treated, then looked at Orihime, "Why did you still save her?"
"Because she was injured."
"I told you, Grimmjow is a dangerous guy, you know that? What would have happened to you if I hadn't come?"
Orihime laughed, "Anyway, I won't die, will I? He wouldn't dare kill me."
Orihime's smile and those words shocked the two Arrancar present. The female Arrancar, who had been captured by Grimmjow and threatened to be cut in half at the waist, began to sob. Ulquiorra, meanwhile, was in a very strange state.
Why aren't you afraid?
Orihime was also sobbing, "I'm not not afraid, I'm afraid of pain, and it hurts so much right now."
"Then why don't you treat yourself?"
Her injuries are still very serious.
Ulquiorra used his Spiritual Power to help Orihime stabilize her severed hand, gently lowering it to ensure Orihime wouldn't feel any pain. He didn't know why he did this, as it clearly didn't fit his personality, but he did it anyway.
Orihime wasn't in any pain, so she smiled brightly at Ulquiorra and said, "Thank you."
Why are you thanking me?
"Because you helped me."
"Your pain was inflicted by my own people, do you know that?"
"Hmm~, but that's your kin, not you. You helped me, just as I'm helping another member of your kin."
Ulquiorra glanced at the female Arrancar, stood up, and said, "That's not one of my kind. My kind isn't this kind of trash."
Ulquiorra left, but the empty Hollow Hole in his heart was filled with something.