u/maesu98

The fights are individual each one is in character

Royal guard training palace eos byakuya vs the espada

Everybody until espada no 7 gets no diffed (arronierro, soz, zommari) since he already no diffed espada 7

Then it's Grimmjow nnoitra and Ulquiorra

Grimmjow gets easy diffed since the Grimmjow of the arrancar arc is relative to no mask Ichigo bankai and byakuya eos > arrancar arc Ichigo because fullbringer bankai Ichigo struggled with Quilge oppe while byakuya no diffed three stenreitter.

Nnoitra gets no diffed because a kenpachi of the arrancar arc beat him byakuya was quivalent to that kenpachi in the arrancar arc and after the training he has grown massively

Ulquiorra will be a mid-high diff when he pops segunda etapa but due to his performance in the fight against Gerard I think he can overwhelme him with senbozakura kageyoshi

Harribel should get mid diffed since she did lose to an FKT Toshiro to whom byakuya is miles above even at the time

Baragan is where things get interesting but I think byakuya gets the dub if he uses ikka Senjika to overwhelm him

Stark vs byakuya shouldn't be that bad from what we have seen in his fight against shunsui byakuya ape out scales starkks aoe and DC so byakuya should win

Yammi gets no diffed

You know how shikai reflects the visible nature of one while the bankai reflects the true self... Like how suzumebachi shows the side of Soi fon which she wants to show the silent assassin while her bankai jakuho raikoben reflects her explosive and lethal nature

Similarly kyoka suigetsu reveals illusions because Aizen doesn't want people to know about him constantly creating new and new versions of himself controlling the narrative... But we know that deep down he probably is lonely and he is afraid of revealing his true self to others possibly having trust issues revealed by his speech of trust

We know that every bankai and shikai are related in nature so I believe that his bankai forces everyone affected to face their deepest fears manifesting them as a hyper realistic illusion which you can only escape if you manage to beat that deep rooted fear

The reason he doesn't use it is simple he is afraid of confronting his own fears hindering it's use or having some side effect

Bankai name : Kyoka Suigetsu: Zettaiteki na kyōfu no kagami

Adyneus

Yhwach

Ichigo Kurosaki

Aizen Sosuke

Ichibe

Yamamoto "Genryusai" Shigenkuki

Senjumaru/Royal Guards

Uryu Uchiha

Haschwalth

Lile Baro

Very Honorable mention: Byakuya "The Goat" Kuchiki

With the thousand year blood war introducing so many characters I noticed something... Members of the soul king seem to choose factions as well as pieces of the soul king may appear in individuals... For example the right hand of the soul king Mimihagi associates itself with the shinigami through it's fusion with jushirou... Meanwhile the heart the left hand and potentially the brain of the soul king associate themselves with the Quincy (Pernida, Gerard, Gremy) with Pernida out right stating it's a Quincy... This puts into question why no member of the soul king associates itself with the hollows or considers itself one the way Pernida considers itself a Quincy additionally why no hollow posses a fragment of the soul king (like how Rangiku possessed one). If anyone has any answer outside of "Kubo just didn't make one" it would be appreciated...

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Knowing the true nature of Ichigo reveals something about getsuga Tenshou and potential why he originally only was able to use it

It combines all three of three of his natures

It is channeled through a shinigami zanpakuto and used during bankai and shikai

It is a destructive energy technique that fires in a straight line and is red in bankai.. it is reminisced of the cero from hollows

It draws reiatsu from it's environment like the Quincy do

So you have to stick with me on this one. We all know how Aizens zanpakuto ability is known as kyoka suigetsu and it's power is complete hypnosis. What if I told you this might not be the case. All zanpakuto to release into shikai mode require a command phrase (like scatter, sting, roar etc) and the name of the shikai (senbozakura, suzumebachi etc). Now at first glance Aizen is no exception right? But what you notice is Aizen saying Shatter kyoka suigetsu and the illusion which he has created shatters. Now if we say that perfect hypnosis is his ability that wouldn't make sense why does he release his zanpakuto after using it's effect and when he releases it the illusion breaks instead of being created and why is it especially shatter. Let's make a sidetrack and talk about Yhwach. Yhwach is the Quincy god supposed son of the soul king possessing the eyes of the soul king but until he was merged with his father he had to channel the almighty through his schrift something which wasn't needed after he achieved foul trasendance. On the other hand after Aizen fully merged with the hogyoku he also merged with his zanpakuto and lost the need to call upon it to shatter the illusions he created. Now for my theory what if Aizens zanpakuto had always been the ability to shatter the illusions which he creates and the perfect hypnosis was a part of him like how Yhwach almighty was a part of him but he channelled it through his own races power the schrift until he achieved trasendance. Like yhwach what if Aizen used his race power system in order to use his innate ability the perfect hypnosis and after fusing with the hogyoku which in large is made by the soul king through his fragments he finally unlocked his full power like yhwach when he fused with adyneus. So if Aizen possessed an innate ability powerful enough to full yhwach possessed incredible reiatsu (at least on par with Yamamoto due to his kyoka suigetsu not being reiatsu negated) and has unknown origins could he be another fragment of the soul king like yhwach or Gerard.

I have hated Fraudtsugaya since day one there's no readiming quality about him he is just annoying and a fraud who is a bankai spammer... Urahara has 0 feats aside from the sealing kido against Aizen.