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*Bankai: Tenze Tsusaiga (天風 強い牙 Divine Wind Mighty Fang) is the name of Shiro's Bankai. When released, a violent surge of wind envelops Shiro and his blade as it hardens and manifests in the form of a series of four, bright crimson wings of pure energy; along with purple gauntlets which give him enough strength to grip his newly-transformed Zanpakutō, which takes the form of a large claymore that the crossguard consists of a small red gem at the center and two straight ornate arms ending in simplistic version of a fleur-de-lis. The sword's handle runs through its guard, continuing on through a purple hollow space at the base of its blade.
The handle is almost the same length of the blade itself. Shiro's appearance changes drastically; his standard Shinigami uniform is modified to include accentuated shoulder armour which is crimson, possessing jagged fins that are highly resiminent of Samurai wear, bound together in the middle by a set of three purple magatama. In addition, he now wears crimson and steel bracers. A faded purple obi sash is wrapped around his waist, leaving his captain's haori to extend down to his feet, similar to a half-trenchcoat of sorts.

Bankai Special Ability: The wings situated upon Shiro's back function as extra limbs which transform into claws that Shiro can utilize for many purposes, such as grappling hooks, snatching foes or objects from a far distance away; it should be noted with a single touch of the claws, the energy shoots outwards, scalding the foe. At a moment's notice, these arms can grow in size if Shiro wishes it to. The swipe itself is incredibly powerful, capable of tearing through many defenses, even sekki-seki to deal incredible damage.

Plasma Manipulation: By compressing the wind vectors to a single point at their utmost limit at overwhelming speeds, Shiro manifests plasma, which is complex and incomprehensible in its formation, rendering it virtually impossible to deconstruct. Shiro can also utilize this plasma as if it were his wind manipulation with little to no effort.

Wind Enhanced Speed: In an instant, Shiro can modify the spiritual particles that compose his body into the wind itself; enabling him to move around freely, without restraint at high speeds, negating any obstructions that would dare to cross his path, allowing him to pass through even seki-sekki. Even if someone could detect his trajectory, it is near impossible to catch him. In an instant, Shiro can disengage the wind, reverting himself back to mass and attack his foes with impunity.