Rangiku Matsumoto vs. Izuru Kira

 is a battle taking place during the Ryoka Invasion between 10th Division Lieutenant Rangiku Matsumoto and 3rd Division Lieutenant Izuru Kira over the discovery of the Central 46's massacre.

Prelude
After 10th Division Captain Tōshirō Hitsugaya discovers the Central 46 has been massacred alongside his lieutenant, Rangiku Matsumoto, he is alerted when 3rd Division Lieutenant Izuru Kira states that he knew Hitsugaya would come as he stands at the top of the stairs leading into the chamber. With Hitsugaya demanding to know if he did this, Izuru leaps out of sight, prompting Hitsugaya and Rangiku to run after him while a mysterious figure lurks behind the other entrance leading into the chamber.

Pursuing Izuru outside, Hitsugaya demands to know if he killed them, but Izuru denies this and reveals that he was let in only moments before Hitsugaya and Rangiku arrived by those within opening the lock and letting him inside. When Hitsugaya inquires who let him in, Izuru asserts that the Central 46 did, to Hitsugaya's confusion and chagrin, and notes that Hitsugaya should be protecting 5th Division Lieutenant Momo Hinamori rather than chasing him. Though an unnerved Hitsugaya is unsure of what he is talking about, Izuru informs him that Hinamori is no longer in the Tenth Division's barracks and recounts how Hitsugaya used Kyōmon to surround the room Hinamori was sleeping in with a high-level barrier that deflects attacks from the outside, thinking this would keep her safe.

However, Izuru points out that Kyōmon is meant to keep people out and not in as he reminds Hitsugaya that Hinamori is a master of Kidō who could easily break such a barrier and put one around herself to conceal her Reiatsu while she moved about. With Izuru concluding that Hinamori has been following Hitsugaya and Rangiku this whole time, a stunned Hitsugaya asks Rangiku to deal with Izuru in his stead, which she affirms, and leaps back to return to the Central 46 Compound.

Battle
Rangiku is surprised when Izuru stops running, and when Izuru explains that his task was to stop her here, Rangiku asks him if his captain, Gin Ichimaru, gave him this task, only for Izuru to assert that he does not have to answer her. As Rangiku questions what is wrong with him and wonders if Gin told him something, Izuru inquires why he should answer to a dead woman, shocking Rangiku, and releases his Shikai, Wabisuke. When Izuru inquires if she does not know what Wabisuke can do, Rangiku confirms that she does not and questions if anybody does because Izuru is not the type to divulge such things. After noting that Hinamori and 6th Division Lieutenant Renji Abarai probably know, Izuru decides to show Rangiku as well and moves to her side before slashing at Rangiku, who draws her Zanpakutō just in time to block. With Rangiku forced back by the force of their clash, Izuru praises her reactions, though Rangiku demands that he not talk down to her, and the two cross blades several more times. Suddenly, Izuru asks Rangiku how many times she blocked his sword, and as she expresses confusion, Rangiku is pulled down by her Zanpakutō, which shatters a roof tile as it lands on the ground, prompting Izuru to reveal that Wabisuke doubles the weight of whatever it strikes.

Elaborating that Wabisuke continues doing so with each successive strike until the defender can bear the weight no more and grovels on the ground with their head bowed as if in penitence, per the name, Izuru observes that Rangiku blocked seven of his blows with Wabisuke and Izuru assumes that an average sword weighs close to 2 lbs, leading him concludes that, after being doubled seven times, Rangiku's Zanpakutō now weighs 225 lbs, which he does not consider a nimble weight. Despite this, Rangiku merely asserts that she intends to hit Gin with her Zanpakutō rather than twirl it like a baton and releases her Shikai, Haineko, transforming the blade of her Zanpakutō into a cloud of ash.

Aftermath
After 5th Division Captain Sōsuke Aizen sets his endgame into motion, 4th Division Lieutenant Isane Kotetsu informs the combatants within the Seireitei of his plot and betrayal. Upon learning of this, Rangiku leaps across the rooftops as she refuses to believe that Hitsugaya lost, leaving Izuru to lean against a cratered wall and express shock at Gin going back on his word of not hurting Hinamori. Later, Rangiku appears on Sōkyoku Hill and restrains Gin as he attempts to intervene in the ongoing conflict.