Key Takeaways
- Shunsui makes a deal with Aizen to aid the Gotei 13 in their battle against Yhwach for much-needed help.
- Aizen, a post-Hōkyōuku fusion, is the most powerful Shinigami other than Ichigo, who has transcendental abilities.
- Aizen's overwhelming power, Kidou's mastery, and immortality make him invincible and indestructible.
In the latest episode Bleach: Thousand Year Blood WarThe newly appointed captain of the 13th Gotei, Shunsui Kyōraku, enters the underground prison of the 1st Platoon's Muken Barracks. There, his best friend Captain Ukitake makes a deal with Shin Mimigahi to save Soul Society, and Shunsui makes a deal with the demon Sosuke Aizen. Kyoraku asks Aizen to help the Gotei 13 in their battle against Yhwach just before breaking the seal. Shunsui knows that, except for Ichigo, there is no one as powerful as Aizen, and he needs all the help he can get.
Two years have passed since Aizen was sealed after his epic battle with Ichigo Dangai at the hands of Kisuke Urahara. Despite this, he is still on a completely different level from anyone else on the battlefield, except for Ichigo and Yohwak. Aizen has always been of a higher level than the average Shinigami, but his fusion with the Hogyouku granted him transcendental power beyond anyone else in the world. bleach.

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BLEACH: Getsuga Jujisho, Description
Ichigo's signature technique has now been greatly upgraded.
Before and after Aizen Sosuke Hogyoku
An anomaly, something superior to all else.
When Sōsuke Aizen was born, the balance of the soul was broken. Aizen is an anomaly in every sense of the word. He shouldn't exist. From the moment he was born, he was far superior to any other Shinigami. However, he knows how to hide it, so he enrolls in Shinigami Academy, joins the Gotei 13, and becomes vice-captain of the 5th Division under Shinji Hirako. After the Hollowfication experiment that ruined the lives of the Shinigami who would become Vizored, Aizen became captain of Squad 5, and later Momo Hinamori became his vice-captain. He used the Zanpakutou Kyouka Suigetsu to fake his own death and betray the Gotei 13, killing all members of Central 46. He retrieved Hogyouku and fled to Hueco Mundo with captains Gin Ichimaru and Kaname Tosen.
Since the beginning of time, no one has stood in the sky. Not you, not me, not even the gods. But that unbearable vacuum is now over. From now on, I will stand…on the sky.
During the battle against the Gotei 13 in the Fake Karakura Town arc, Aizen easily defeated all members of his unit except former captain Yamamoto. All of this without utilizing the complex Kidou techniques he is an expert at, or even Bankai if he has one. The only enemy that Aizen considered close to him in terms of power was Yamamoto, and he created an experimental Arrancar named Wunderweiss Margera to deal with him.

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BLEACH: Reaper of Peace version, explained
Is the version of peace that the Shinigami is trying to protect something extremely distorted?
He then fuses with Hogyouku and begins to evolve into a transcendent being. While transformed, he easily battles Urahara, Isshin Kurosaki, and Yoruichi Shihoin. After he reaches a new stage of evolution, his power is so overwhelming that he can completely erase any human that gets close to him. After being betrayed by Gin Ichimaru, he evolves again, and ultimately achieves a monstrous transformation while fighting the newly evolved Ichigo. He was hit by Ichigo's final Getsuga Tenshou: Mugetsu. And still he survives. He was sealed by Urahara, and the new Central 46 sentenced him to 18,800 years in prison in Muken.
There, Aizen quietly honed his power while fused with the Hogyouku and completely abandoned the physical form of his Zanpakutou, Kyouka Suigetsu. When Yhwach went to see him during the First Quincy Invasion, he was able to use the power of the Zanpakutou just by letting Yhwach see him. Aizen became one with Zanpakutou and Hogyouku.
Aizen's current power
Invincible and overwhelming
Thanks to his merger with Hogyouku and his transcendental evolution, Aizen Sousuke is the most powerful Shinigami in existence other than Kurosaki Ichigo, which is a completely different case. Aizen can easily unleash his power without releasing his Shikai. Your proficiency with Kidou has also increased. He can cast extremely powerful Kidou spells without spells. Hadou 99: Kurohitsugi (Black Box) and Hadou 99: Goryuutenmetsu (Five Dragons of the Vortex of Destruction) are among the most powerful techniques in Bleach.

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Bleach: Everything about Soul King, explained
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In addition to his overwhelming strength, he is virtually immortal and indestructible. He can withstand any injury and survive. Aizen would have to be hit by the power of a god to take any significant damage or even come close to death. Thanks to the Hogyouku, Aizen's already abnormal strength has tripled. When the Muken guards approached to restrain Aizen, Aizen's hand disintegrated as soon as he approached. Aizen's spiritual pressure is so dense and powerful that anyone who gets close to him will die instantly. The seal does not erase his spiritual pressure, it merely keeps it nearby.
I have to say… you are a really interesting person. Want to get some fresh air? Could it be a breath of fresh air for Soul Society being summarily crushed by Yhwach?
Shunsui also released only three of Aizen's seals: his mouth, left eye, and ankle. This means that most of Aizen's body is still sealed. This is just a portion of his overall abilities. Yhwach previously revealed that Aizen was one of the special war threats. This is due to Aizen's nearly infinite strength and mental pressure. He is invincible, fuses with Hogyōuku, fuses with Zanpakuto, and is a refined version of his transcendental evolution.
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Bleach: Thousand Year Blood War
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Based on Tite Kubo's Battle Shonen manga, Bleach centers around Ichigo, a high school student who is dragged into the world of Soul Reapers. The original animation was completed in 2012, but was revived in 2022.