Drive

"*{{{1}}}*"
*"Fusion Trance... Liberator Arm!"*
—Mirei Shikishima when accessing Drive
**Drive** (ドライヴ *Doraivu*) is an effect caused when a Liberator and Extar combines their power through syncronization, so that the Liberator can wield the Extar that has transformed into a weapon.

## Usage

The effect can only take place if the user is infected with the A-Virus, that only affects female chromosomes. The Liberator and the extar goes through a process that arouses the Extar, so that she can transform into the weapon that she is ought to be.

When the bond between a Liberator and Extar is powerful and strong enough, they can enter Drive without the need to sexually arouse the Extar.

### Liberator

A **Liberator** (リブレイター *Ribureitā*) is the name for those that cannot transform into a weapon, but has the ability to wield the weapon when paired up. Liberators with strong abilities are also known as naturals, as they do not need to go through the process of enhancement and are able to wield a weapon easily and have high physical abilities.

**Known Liberators**
* Mirei Shikishima
* Meifon Sakura
* Akira Hiragi
* Charlotte Scherzen
* Kasumi Shigure
* Ange

### Extar

An **Extar** (エクスター *Ekusutā*) is the name for those that are able to transform into a form of weapon after being sexually aroused. Extars with strong abilities are also known as naturals, as they do not need to go through the process of enhancement and are able to become a strong weapon.

**Known Extars**
* Mamori Tokonome
* Hibiki
* Nimi Minimi
* Kōzuki

### Hybrids

A **Hybrid** (ハイブリッド *Haiburiddo*) is the name for those that are not only able to wield a weapon and act as a liberator, but are also able to turn into an arm and act as an extar. This rule is also a variation of the original virus, causing all girls on the island Bhikkhuni to become Hybrids.

All girls on Bhikkhuni are affected by the variation of the A-Virus known as the V-Virus, allowing them to act either as a Liberator or an Extar depending on their role.

**Known Hybrids**
* Rain Hasumi
* Lady J
* Rinka Kagurazaka
* Ranka Kagurazaka
* Momo Kuzuryū
* Mana Inagawa
* Viola
* Koharu Tsukikage
* Momoka Sagara (unofficially due to her Extar status for unknown reasons)

### Soldier Arm

A **Soldier Arm** (ソルジャーアーム *Sorujā Āmu*) is the term given to those that are chosen for the enhancement program that causes them to become not only a stronger weapon that was artificially modified and enhanced, it also allows them to use their own virus to create a weapon for themselves, and they can freely use other weapons. However, due to the chemicals added to their bodies, it can cause great damage if the repression pills are not taken before activation, and signs of damage can be seen when first used, as enhanced users have their hair color bleached due to the chemicals.

**Known Soldier Arms**
* Momoka Sagara
* D5
* E9
* Mirei Shikishima

## Varieties

Other than the basic level for drive, there are the upgraded levels for the Drive.

### Final Form

The **Final Form** (ファイナルフォーム *Fainaru Fōmu*) is the name given to the Hybrid pairs combined into a single powerful Arm, but cannot control on their own and requires another Liberator to control the arm. The only known Final Form users are Rain Hasumi and Lady J, wielded by Mirei Shikishima.

### Valkyrie Effect

The **Valkyrie Effect** (ヴァルキリー・エフェクト *Varukirī Efekuto*) is the name given to when an Arm activates out of strong will power or through the process of drive that wishes to become stronger for the Extar's own purposes. The Valkyrie Effect takes in the A-Virus from its neighbouring affected users to evolve into a stronger and larger form of a weapon. This is also a proof of the bond between the Liberator and the Extar, as it requires the matching rate to be high to activate.

### Valkyrie Drive

The **Valkyrie Drive** (ヴァルキリー・ドライヴ *Varukirī Doraivu*), or also known as the **Perfect Form**, is when the matching rate of the Liberator and Extar is 100%, causing the arm to merge into its Final Form with the liberator that gives it a glowing aura, and most likely a form that combines the appearances of the Liberator and the Extar and appears as a set of armor with the original existing weapon enhanced naturally. The Valkyrie Drive is the final and upgraded version of the Valkyrie Effect, and is the antidote to the A-Virus, as the users take in the neighbouring virus cells in order to maintain their form, removing the cells from a user's body entirely. For the Valkyrie Drive to happen, this shows that the Liberator and Extar are a 100% perfect match.

## Trivia

* The activation rule for the Valkyrie Effect and Valkyrie Drive is an exception for the Bhikkhuni island, as with one person, they enter multiple drives to reach the final form.
* The weapon transformation of the Extars affected by Liberators' kiss are based on the weapon forms of Demon weapons from *Soul Eater series*. However, the elements of Drive (including the designs of Extars' weapon forms) bears striking similarities to the transformation sequences (i.e. *poses*) of the Kamen Riders, while Mirei's Drive activation call (*Fusion Trance: Liberator Arm!*) in the first episode of *Mermaid* is based on the Riders' traditional transformation call (*Henshin!*).