Hiuchiishi no Otome (spirit)

Hiuchiishi no Otome (火打石の乙女, Flint's Maiden) is the Zanpakutō used by Nathaniel DreadBane, although he affectionately refers to her as Flintlass (フリントラス, Furintorasu).

Sword
It takes the form of a katana, with a silver guard that curves around his hand similar to a cutlass' and a hilt with blood red stitching. The blade itself has a standard reach. Halfway from either end of the blade is a three inch long gap that has no sharp edge, and curves on the inside. A pair of red tassels hang from the end of the hilt.

Shikai
Its release command is "Forge Your Steel" (あなたの鋼を鍛造します, Anatano Kou Wo Tanzou Shimasu; lit. Your Steel is Forged). When released, it takes the form of a 17th century flintlock pistol with a wooden handle and a golden barrel and plating, and a cutlass attached to its elongated barrel. This makes Flintlass the only known Zanpakutō to take the form of a firearm. On its own it can fire shots made of reishi at an opponent.

Shikai Special Ability
Flintlass has two main abilities; the first is Ichigeki Hissatsu (一撃必殺, One Shot One Kill), named after the four character idiom of the same name. To perform it, Nathaniel pulls the hammer of the pistol back and fills Flintlass with spiritual energy, to the point where its golden edges glow a faint green. He shouts "Ichigeki Hissatsu!" and pulls the trigger, releasing the energy. When fired, the attack launches a wide angled green stream of spiritual energy, adorned by thin blue lightning bolts alongside it. The attack's name is an oxymoron to the attack itself, as it has the potential to kill more than one person in the attack's vicinity. The shot itself can be compressed into a smaller stream, making it more powerful and destructive than its wide-range equivalent. With the command "Divide" (分割, bunkatsu), Nathaniel activates the second ability and can separate Flintlass into its respective cutlass and flintlock forms and either use them both in combat or transform either the flintlock or the cutlass to its opposing weapon (the flintlock would transform into a cutlass, and vice versa).

Bankai
Hiuchiishi no Otome no Ō no Tōzoku (火打石の乙女の王の盗賊, lit. Flint's Maiden of the King of Thieves) is Nathaniel's Bankai release. When released, he loses the top half of his shihakushō and Captain's haori. He gains a gold-trimmed tricorner hat, an open brown vest with a tan edge, and two versions of Flintlass' sealed form hang from his belt. As well, thirteen brown (and seemingly rusted) long swords with hexagonal guards levitate behind him, spread out like wings. It rivals Ichigo Kurosaki's in terms of size.

Bankai Special Ability
Its abilities lie mainly in the transformation of the thirteen swords on Nathaniel's back. Each time Flintlass in either sealed, Shikai or Bankai form strikes, is struck, or is in the prescence of another's Shikai or Bankai release, Nathaniel can use the swords to mimick the Zanpakutō's appearance and abilities. Usually, one sword can be used to copy a Shikai, and in some cases, a Bankai. For example, Nathaniel can use one sword to copy Ichigo's Tensa Zangetsu, which allows him to don a replica of his red-lined coat and have twelve black daitōs hover behind him. However, the greater the effect either release has, more swords must be sacrificed. Nathaniel must use five of his swords to access Byakuya Kuchiki's Senbonzakura Kageyoshi. However, the two sealed forms on Nathaniel's belt can count towards the use of ten swords.