Haizento

A **Haizentō** (*Kanji*: **肺然刀**; *English*: **Lung-like Sword**) is a kind of nihontō-shaped weapon which was invented by Inuzuri Hotaru.

## ***Function and Mechanics***

### *Blade*

A haizentō's blade is an external lung which is able to absorb and transport air.

The blade's edge is responsible for absorbing air from the blade's surroundings, while the blade's back is responsible for transporting the air into the body of the blade's collar.

### *Collar*

A haizentō's collar is an air filter which is able to filter and transport air.

As soon as air has been transferred from the blade's back to the collar, the collar will filter out all gasses other than oxygen and then transport the oxygen into the haizentō's grip.

### Guard

A haizentō's guard is an artificial **Saketsu** which is able to boost any spiritual energy that is channeled through it.

Depending on the quality of the haizentō, the guard is able to augment a certain amount of spiritual energy by a certain degree. The amount of spiritual energy is ranked from S as the highest to E as the lowest, while the degree of augmentation is ranked from 6 as the highest and 1 as the lowest. So the highest quality of haizentō would have a S6-ranked guard, while the lowest quality haizentō would have an E1-ranked guard.

#### **Energy Limitations Rank** (**ELR**)

* **S** - Immense
* **A** - Great
* **B** - High
* **C** - Enhanced
* **D** - Average
* **E** - Basic

#### **Energy Augmentations Rank** (**EAR**)

* **6** - Immense
* **5** - Great
* **4** - High
* **3** - Enhanced
* **2** - Average
* **1** - Basic

### *Grip*

A haizentō's grip is a nexus between the body of the haizentō's wielder and the haizentō itself. Notably, the grip is able to imbue oxygen into the body of the haizentō's wielder.

As soon as air has been transferred from the haizentō's collar to the grip, the grip will imbue the oxygen into the body of the haizentō's wielder. By doing so, the grip will provide the haizentō's wielder with all of the benefits of the Zettaino Kisoku and thereby allow the haizentō's wielder to forgo using breathing as a means of survival in favor of using breathing as naught but a weapon.

### *Pommel*

A haizentō's pommel contains a **Gikon** which is able to function as both an artificial intelligence and a prosthetic **Hakusui**.

As an artificial intelligence, the pommel's Gikon is responsible for operating and repairing the haizentō's machinery. It's also responsible for maintaining the health of the haizentō's wielder by preserving the wielder's life with Kaidō. While as a Hakusui, the Gikon is responsible for generating spiritual energy and then both providing that spiritual energy to the wielder and using that spiritual energy to induce either development of a Hakusui within the wielder or an improvement of the wielder's Hakusui.

It should be noted that the pommel's Gikon is as independent and intelligent as a **Kaizō Konpaku**, but it lacks a Kaizō Konpaku's ability to modify an entity and thus is not a Kaizō Konpaku. As such, unlike a Kaizō Konpaku, the guard's Gikon is not forbidden or illegal in any way.

## ***Ability to Grow***

### *Overview*

All haizentō exhibit the ability to grow as people and weapons alike.

A haizentō is able to grow as a person by accruing experience and developing relationships, while a haizentō is able to grow as a weapon by learning how to fight as its wielder's partner rather than serve as its wielder's weapon. By growing as a person, a haizentō is able to increase its ELR and EAR. And by growing as a weapon, a haizentō is able to attain Gattai and then a Kyōmeijō.

### *Gattai*

**Gattai** (*Kanji*: **合体**; *English*: **Combination**) is a maneuver which allows a haizentō and its wielder to both augment their spiritual energy and combine their spiritual energy. By doing so, a haizentō and its wielder is able to power up their spiritual energy and share their spiritual energy with one another.

In order to perform Gattai, a haizentō and its wielder has to mix their spiritual energy together and then resonate their spiritual energy with one another.

### *Kyomeijo*

A **Kyōmeijō** (*Kanji*: **共鳴状**; *English*: **Resonance Form**) is a form that a haizentō is able to design and transform into by learning how to fight as its wielder's partner rather than serve as its wielder's weapon. In order for a haizentō to be able to design a kyōmeijō, the haizentō and its wielder must have learned and mastered the art of Gattai.

After a haizentō and its wielder have learned and mastered Gattai, the haizentō will be able to design a kyōmeijō. Depending on the haizentō and its wielder, designing a kyōmeijō could take from a day to a year. Subsequently, after a kyōmeijō has been designed, the haizentō will be able to develop the kyōmeijō. Once again, depending on the kyōmeijō, developing a kyōmeijō could take from a day to a year. But afterward, at its wielder's command, the haizentō will be able to transform into the kyōmeijō.

Notably, kyōmeijō are not like shikai. As each and every kyōmeijō is designed for melee and focuses on either exploiting or facilitating the usage of Atem. For this reason, kyōmeijō should be viewed as complements to Atem rather than as standalone weapons.