Oh-Etsu Nimaiya is a member of Zero Squad who is the creator of the zanpakuto.
Oh-Etsus background is largely unknown at this time, but he was previously a powerful captain of the Gotei 13, and is the sole person credited with the creation of the weapon all Shinigami use, Zanpakuto. At some point after the creation of the Zanpakuto, he was inducted into the Zero Division and tasked with the protection of the Soul King Palace and the Spirit King.
His body was altered by the Spirit King upon induction, and his bones were changed into the Ōken, the key into the dimension where Soul Palace resides in.
Oh-Etsu appears as a large dark skinned man of an average build. His hair is shaven on the sides of his head and dyed bright green, in contract to his natural dark hair colour and large size. He is generally always seen wearing a pair of gold framed, blue lens, sunglasses.
His attire is a variation of the standard Shinigami uniform, with the addition of a green undergarment, a shortened hakama, and a large puffer jacket that doubles as a standard Royal Guard Haori, with the Royal Guard insignia stitched into the back of it. His footwear is a simple pair of gold trimmed green slippers.
Oh-Etsu is shown to be a very energetic and eccentric man, which is shown when he prepares a large and grand greeting for Ichigo and Renji when they enter his city. However he has shown the capacity to get serious if the situation calls for it, such as when it comes to his work. His fellow Royal Guard member Kirio Hikifune calls him an unpredictable man.
Oh-Etsu appears for the first time along with the rest of the Zero Division, when they descend from the Soul King Palace into the Soul Society shortly after the end of the first invasion by the Wandenreich, and the death of Captain-Commander Yamamoto. Oh-Etsu didn't say much of anything when they went down below, but once they had conducted their business in the Soul Society, the Royal Guard left for the Soul King Palace once more with Ichigo, Renji, Byakuya and Rukia in tow via Kukaku Shibas Cannon.
Oh-Etsu is not seen again until his assistant Mera informs him that Ichigo and Renji are both entering his palace. Oh-Etsu greets them both with an incredible display, and identifies himself as the creator of the Zanpakuto. After begin beaten down by Mera, she takes them all to the real palace, which was just a small shack on the edge of a pointed cliff. When he opens the door, Ichigo and Renji both walk into a pitch black room and fall down a few meters into some type of endless arena. Oh-Etsu explains to them that everyone in his city, aside from himself, are actually Zanpakuto. Explaining further that the fact they couldn't tell the difference was worrying. Taking their Zanpakuto in hand and shattering them both easily, he tells them that a Zanpakuto that gets no love shatters. Oh-Etsu then tells them that should they be capable of leaving the arena alive, he will re-forge their blades once more, just as a mass of figures rise up in the arena with the name "Asauchi".
As Ichigo and Renji fight for their life, Oh-Etsu explains the nature of Asauchi, and how they are the raw material from which all Zanpakuto in existence are created. All shinigami in the Gotei 13 are given one and over time they create their own Zanpakuto by pouring their own soul into it, hence why each one is unique for to wielder. The Asauchi relentlessly attack Renji and Ichigo, and Oh-Etsu tells them that because of their misuse and mistreatment of their Zanpakuto, the Asauchi are angry at them.
The fight continues for 3 days until finally Oh-Etsu stops the battle, and congratulates Renji on passing the test. Ichigo however failed, and after Ichigo tries to plead with Oh-Etsu about letting him continue on, Oh-Etsu berates him for it by telling him the Asauchi have deemed Ichigo unworthy and that he is not a true Shinigami because of it. Oh-Etsu then tells Ichigo to never set foot in the Soul Society again and forcibly sends Ichigo back to the human world with a teleportation Kido in order for him to try and learn the truth about himself and his soul. After Ichigo had left, Oh-Etsu discussed the events with Renji, telling him that as the creator of the Zanpakuto, he is aware of every Asauchi in existence, regardless of how they were obtained or who obtained them. Stating that all Zanpakuto have to be made from an Asauchi and by extension, he knows about all the Zanpakuto in existence. He also notes that Ichigos "Zanpakuto" was not a true one as it was not made from an Asauchi, and therefor he is not a true Shinigami. Oh-Etsu remarks that Renji and he already knew that Ichigo could never pass the test, and that its purpose was to make Ichigo think about who he truly is.
After Ichigo came to understand just who he truly is, Oh-Etsu sends Mera back to the human world to bring Ichigo back to the Soul King Palace. When he finally arrived, Oh-Etsu subjected Ichigo to the same test once more, and this time round Ichigo simply extended his hand and took one of the Asauchi for his own, watching as the black skin of the Asauchi peeled off to reveal a white hollow-like Ichigo. With Ichigo having finally chosen a true Asauchi to re-forge his Zanpakuto, they all leave down a large water slide deeper into Oh-Etsus palace. Entering into Oh-Etsus personal Zanpakuto forge, he tells Ichigo to say goodbye to his current Zanpakuto, Zangetsu, and prepare to receive his new Zanpakuto.
At that moment, Oh-Etsu summons in his assistants and bodyguards to help him in the forging process. As the forging begins, Ichigo wonders why Oh-Etsu removed his sunglasses, and he explains to Ichigo that this allows him to see the shade of the flames in order to forge it properly. Oh-Etsu then begins to explain the nature of Ichigos chosen Asauchi, asking him if he though its appearance was strange, explaining to Ichigo that his inner hollow is actually his true Zanpakuto, which happened due to the events that transpired when his mother fought with the hollow name White, created by Sosuke Aizen. He further explains that the spirit pretending to be his Zanpakuto until now is actually the real manifestation of his latent quincy powers, stating that the appearance it has taken is similar to the appearance of Yhwach 1000 years ago.
As Oh-Etsu prepares to finish the forging, he allows Ichigo to pour his own soul into the blade and strengthen it. Ichigo then lifts the blade up, the large ocean surrounding the forge vaporises, which shocks everyone. Oh-Etsu notes that it happened to cool off his still burning hot Zangetsu, but admits that he has never seen it happen to this extent. As Ichigo stands there holding his new Twin Zangetsu, Oh-Etsu asks Ichigo how they feel in his hands.
Oh-Etsu is not seen again until Yhwach, Uryuu and Jugram manage to invade the Soul King Palace, due to Ichigo inadvertently temporarily destroying the 72 barriers protecting it. As they try to push their way deeper into the Soul King Palace, they are stopped in their tracks by Kirio Hikifune, who creates a cage around them using a reishi consuming tree. Oh-Etsu emerges from above them and lands inside the cage carrying his Zanpakuto in a large tank of liquid. Drawing it out he proclaims to Yhwach and his Elite Sternritter to come at him simultaneously, stating that the true fight begins now.
As he says this, Gerard Valkyrie launches towards Oh-Etsu and tries to kill him, only for Oh-Etsu to dodge the attack. Before Gerard could try to attack again however, Oh-Etsu kills him with a single cut from his sealed sword, much to the shock of the other Elite Sternritter. Lille Barro then takes aim with his rifle and attempts to kill Oh-Etsu, but his bullets are casually sliced apart by Oh-Etsus sword before they can hit him, smashing into the cage surrounding them. Oh-Etsu then closes the distance between them and kills Lille with another casual swing of his sword. One of the two remaining Elite Sternritter, Pernia Parnkgjas, then attempts to attack him, but is swiftly impaled through the head by Oh-Etsu before he can launch the attack. Oh-Etsu then quickly tries to kill the final Sternitter by removing the blade from Parnia and swinging it towards Askin, however Askin manages to react to this and just about manages to dodge Oh-Etsus swing suffering a minor cut to his throat and landing on the ground behind them.
Oh-Etsu compliments his speed, but then slices open his throat before he can stand up to continue fighting. He then beings to explain the mechanics behind the sword he is wielding, claiming that it was a failed creation and that it's simply too sharp to be used like a normal sword, even noting that creating a sheath is all but impossible to contain it because of how sharp it is. As Oh-Etsu prepares to attack Yhwach directly, he is shocked to see Askin still alive, hearing him state that a blow so weak would be unable to kill him, as he begins to explain his power to Oh-Etsu who collapses to the ground under the effects of "The Deathdealing".
Askin starts to explain how Oh-Etsus blood is starting to kill him, stating how his power allows him to alter the lethal dose of substances. Oh-Etsu thanks him for the explanation, and cuts his own throat in order to drain out a large portion of his blood to lower the lethal dose. Askin tells Oh-Etsu however, that it's only a temporary solution as soon he will die from massive blood loss anyway. Oh-Etsu notes this and calls for Kirinji, who activates his hot spring water to clean out and replace all of Oh-Etsus lost blood, completely revitalizing him and removing the lethal effects of Askins "The Deathdealing", at which point Oh-Etsu immediately attacks Askin and kills the Sternritter with a single swing of his sword. He then turns towards Yhwach and prepares to attack him, as Yhwah begins to charge an unknown ability.
Oh-Etsu notes that despite his notable power, they have very little information on Yhwach, only having the information they gathered from his fight with Yamamoto 1000 years ago and what Royd Lloyd was capable of when he was posing as Yhwach during the first invasion. Realising that this battle will require more than a single swing from him, he surmises that his best bet would be to just start by attempting to cut off his limbs. However before Oh-Etsu could launch his attack, the ability Yhwach was preparing is revealed to be the Auswahlen, which forcefully killing the remaining Sternritter still fighting down in the Soul Society and strips them of their powers. Yhwach then revives the dead members of his Elite Sternritter with his reacquired power and prepares to battle the Royal Guard. Oh-Etsu is shocked to witness the Elite Sternritter stand up, all having activated their Quincy: Vollstandig, ready to fight once more.
Before Oh-Etsu can react to the newly revived Sternritter, a small portion of his left shoulder is blasted off by Lille Barro, at which point both he and Jugram begin to explain the Auswahlen and “The X-Axis”, before Lille fires another shot directly at Oh-Etsu. This shot is intercepted by Kirio and Tenjirou, however they notice too late that the shot managed to penetrate straight through their attempts to stop it leaving Oh-Etsu standing motionless having had a hole blasted through his chest by Lille.
As a member of the Royal Guard, Oh-Etsu is one of the strongest shinigami to have ever existed. Oh-Etsus strength and skill as a captain class shinigami is likely legendary, as he was personally selected for the Royal Guard due to his overall power and impact on the history of the Soul Society itself. Due to begin a member of the Royal Guard, Oh-Etsu has also displayed a high level of skill in the art of Kido, being able to fire off two enchanted restraining kido by pointing towards his target. Oh-Etsus bones are also etched with The Ōken, the great key which allows one to enter into and out of the Soul King Palace at any given time. It also gives the wielder of the Ōken a tremendous level of durability, as the Ōken is the only know thing to completely destroy the barriers that separate the Soul King Palace from the Soul Society, without being destroyed in the process. Oh-Etsus weapon of choice is a blade called Sayabuse, something he himself claims is a failed creation of his. The blade itself appears ordinary, however the edge is so smooth and sharp that it simply cuts through anything with a casual swing. His skill using the blade is great enough that he is able to use it to dispatch multiple powerful targets casually. Oh-Etsu carries his failed creation "Sayabuse" in a large tank filled with an thick gel-like liquid, due to how sharp the blade is, making a conventional scabbard impossible to use.
Oh-Etsu is personally credited with the creation of all Zanpakuto, and is the only know person capable of creating the strongest Zanpakuto, Asauchi, the base template for all would be Zanpakuto. The Asauchi themselves are considered the most power incarnation of a Zanpakuto as they are able to become practically anything. Due to his link with all Zanpakuto, Oh-Etsu is able to sense the nature and location of every Zanpakuto in existence, regardless of how it was created or who it is wielded by.
|The Ōken - The Ōken, otherwise known as the Kings Key, is entity which allows entry into the Soul King Palace. Obtaining it is the sole way in which one can enter into and out of, the Soul King Palace. Previously thought to be a physical object, it is revealed that the Ōken is simply a power granted to members of the Royal Guard, which literally makes their very bones the Ōken itself. As Oh-Etsu is a member of the Royal Guard, his bones are the Ōken, and it's likely his durability is increased to a level where he is able to break all 72 barriers protecting the Soul King Palace unaided.|
|Asauchi Creation - Oh-Etsu is personally involved with the creation of every single Asauchi in existence, which makes him the father of all Zanpakuto in existence. The Asauchi he creates are essentially blank pages, which develop over time with their Shinigami. Because of this Asauchi are considered to be the ultimate and strongest form of a Zanpakuto one can have, as they have the capacity to become anything imaginable. The way Oh-Etsu creates the Asauchi is currently unknown, but he did note that Aizens hollow "White", was born of a similar creation to that of an Asauchi. Due to having created every Asauchi in existence, Oh-Etsu is linked to every Zanpakuto in existence, regardless of where they are or who is wielding them.|
|Zanpakuto Forging - Oh-Etsu is also a highly skilled “blacksmith”, begin able to personally forge a true Zanpakuto from an Asauchi. He does this with the assistance of Mera, Tokie, Hasuka, Nonomi and Tsumiko, Zanpakuto he personally forged to be his assistants and bodyguards. When he is finished forging a Zanpakuto, the ocean surrounding the forge absorbs the hot reiatsu in order to cool the blade down, much like conventional forging. During the process, one is able to pour their soul into the newly forged Zanpakuto to strengthen and personalize it. Oh-Etsu notes that the more water that is needed to cool the Zanpakuto, the stronger the blade is.|
Sayabuse is the failed creation of Oh-Etsu Nimaiya. It is kept upright in a tank of thick gel-like liquid due to the fact that a normal scabbard is unable to contain the blade due to nature of just how sharp the blade itself is. Oh-Etsu explains that the sword is so sharp that it never chips or scratches from use and that any liquid, like blood, that get on the blade rolls right off without any resistance or stick. The reasons for its creation are currently unknown, but Oh-Etsu claims that the sword was never put into circulation because of how sharp and fine the blade is, making it impossible to place into a normal scabbard, stating that the blade fails to meet the very definition of "Sword".
|Yet to be revealed.|
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