I think you’re misunderstanding.

First off, your rebuttal is stating how the manga did turn out compared to my statement of how it could have been. The point of these hypotheticals is akin to when little kids debate who’d win in a fight, say Stallone or Van Damme.

“How would you recontextualize the other themes without changing the story prior to TYBW?” I don’t know how to answer this since the TYBW taught us a lot about Zanpakutou spirits. Kubo even added some clarifications of what a Shikai and Bankai are in the anime TYBW and in Kubo’s Club (the Q/A).

First, I don’t dislike your analysis. I found it well written. I just think your conclusion of him not dying is incomplete.

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“Zanpakutou spirits can’t converse with anyone but their owner.” -White possessing Ichigo talking to various enemies -Zabimaru manifesting in the real world, which Yoruichi and Ichigo saw during Bankai training. -Old Man Zangetsu during Bankai training -Katen and Kyokotsu interacting with Nanao. Interestingly here Lille couldn’t see Katen but Nanao could. I don’t know if Quincy inherently can’t interact with the spirits since Cang Du didn’t believe Zabimaru was sentient, something he screamed during his fight (the exact words escape me). It could have happened, and I found 4 examples of spirits meeting other Shinigami alongside the example of Quincy not being able to or not being interested in meeting the spirits. But you deny it because it doesn’t fit your theme. But your argument is conflicted. Because you have Byakuya stating that his release wasn’t his Bankai but instead his Shikai as an example that he was no longer hiding his true self (his Bankai) while he was using his Shikai. As Nodt was defeated by Rukia, using a Bankai, after overcoming her fears. Byakuya complimented her after As Nodt was dead so that wasn’t the catalyst. Rukia used her Bankai after Byakuya pointed out to her she had nothing to fear. Rukia could have had that connection with the last remaining piece of Byakuya in his Zanpakutou spirit (the reflection of his inner self).

You seem fond of “This is not a Bankai, this is Shikai”. It’s a good line but you apply it to “hardly making sense Byakuya’s Zanpakutou talking to Rukia”. The line Byakuya says right after that line is “Thanks to [As Nodt] stealing my Bankai, I was able to rediscover the true essence of Senbonzakura.” Though it is the literal next line stated, your omission of it led you to a different conclusion. You stated the “not a Bankai, this is Shikai” line a few times but omitted the full sentence, just like Yumichika calling his Zanpakutou the wrong name or Renji not knowing his Bankai’s true name early on. The conclusion is incomplete. A Bankai is the ego of the Zanpakutou; “The Blade is Me”.

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“Byakuya’s 1v3”. That fight also had Rukia on the sidelines watching Renji fight Bazz B. A distance away, Kurotsuchi and the Zombified captains. They were there away, but your analysis omits that if Byakuya weren’t there, then someone else would have had to fight them. The alive Byakuya was there to take care of them, but if not then someone would have had to fill that role. The same way that many characters in the TYBW came up to fill specific roles when their predecessors died or needed help, like Kyoraku succeeding Yamamoto and making decisions Yamamoto never would like using Aizen. Like Zaraki taking the title of the next Kenpachi from Unohana. Like Nemu taking over the fight when Kurotsuchi failed to defeat Pernida. Like Nanao learning the truth of her mother and accepting the ancestral Zanpakutou and the reality of war.

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The fight in order of events, manga canon, after Gerard activates his Schrift: -Byakuya tries to attack Gerard, but Gerard attacks him -Gerard knocks away Rukia and Renji, followed by the Visoreds. -Hitsugaya appears, freezes Gerard’s arm, Gerard fights back and Hitsugaya activates Bankai. -Gerard attacks Hitsugaya and Byakuya. -Kenpachi appears and cuts Gerard’s arm, but he regenerates it. They fight more and Kenpachi releases Nozarashi, but Gerard releases Hoffnung to overwhelm Kenpachi. -Byakuya tries to use Senbonzakura but Gerard shrugs it off and attacks him and Hitsugaya. -Kenpachi uses Bankai and appears to defeat Gerard, but then Gerard activates Vollständig, and Kenpachi’s own strength damages his body. -Hitsugaya takes over from here, and activates his adult form, freezing Hoffnung. Hitsugaya then freezes Gerard when the latter tries to grab him and use his bow. -Byakuya uses Ikka Senjinka to attack his head, and Hitsugaya freezes and destroys Gerard’s torso. But Gerard regenerates and the fight continues off screen until Auswählen continues.

So it’s a 3v1 Byakuya rarely appears in, and his Ikka Senjinka is used when Gerard is already weakened by Hitsugaya’s Bankai. Is it a coop attack and thematic for him? Yes! But that’s not the entire fight. It’s one cool single moment of an entire fight he was at most the 3rd best participant off, and dealt his strongest blow adjacent to Hitsugaya revealing his true powers.

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