Gokusha

* Current
* Katsuhiko
* Altered

### Motif:

**Gokusha**: Hokkaido Wolf, Kamen Rider Vulcan, Kamen Rider Naki, Diamond plate, Restraints
**Vulcan**: Hokkaido Wolf, Firearms, Kamen Rider Gokusha

### Rider Type:

Security Guard (Formerly)
Villain (Formerly)
Anti-Hero (currently)
Protagonist (currently)

### Affiliation:

Hiden Intelligence (Intended, formerly)
MetsubouJinrai.net
Humagears
Zetsumetsu Squad (Currently)
Syncnet (Formerly)

### First Appearance:

MetsubouJinrai Origins (continuity order)
Dream Riders x Dream Sentai: New Generation (production order)

## **Kamen Rider Gokusha****Kamen Rider Ark-Zero****Kamen Rider Vulcan****Kamen Rider Thunder**

* Gokusha
* Ark-Zero
* Thunder

*For the character in Kamen Rider The First, see Katsuhiko Yano.*
**Gokusha** (獄, *lit. Prison*) formerly known as **Katsuhiko** (矢野, **Katsuhiko**) is a member of MetsubouJinrai.net and a founding member of the Zetsumetsu Squad as **Kamen Rider Gokusha** (仮面ライダー獄, *Kamen Raidā Gokusha*, lit. Masked Rider Prison). However, his disloyal allegiance to the Ark was exploited by the satellite, who possessed and used Ensa's body as a host of **Kamen Rider Ark-Zero** (仮面ライダーアークゼロ, **Kamen Raidā Āku Zero**).

## History

### Origin

Gokusha was originally a Security-Type HumaGear named Katsuhiko who was suppose to be used by Hiden Intelligence along side Ayako before getting taken by Horobi. During the Daybreak Town Accident, Gokusha, alongside Kura, Niku, Itami, Ensa and Besshi, was hacked by the newly activated Ark; he thus became a member of MetsubouJinrai.net, with their goal to wiping out humanity aligning with the Ark's own.

### First Move

Gokusha starts to act after the death of Korenosuke Hiden. He provides defence for Kura, Niku and Itami.

### Syncnet's Bidding

Kura and his team were tasked to work with Syncnet despite his disapproval of the organization.

## Movies and other events

### Dream Riders x Dream Sentai: New Generation

Gokusha is one of participating Kamen Riders as part of the All Riders fighting for his own and everyone's existence. Dream Riders x Dream Sentai: New Generation

## Forms

* Forceriser
* Ark-Zero Driver
* Shotriser
* Clone Riders

* Hokkaido Wolf

**Hokkaido Wolf**

"Forcerise! Hokkaido Wolf! Break down."
―Transformation announcement[src]
**Rider Statistics:**

* **Rider Height:** 189 cm.
* **Rider Weight:** 91 kg

**Ability Parameters:**

* **Punching Power:** 36.7 t.
* **Kicking Power:** 78.6 t.
* **Maximum Jump Height:** 49.9 m.
* **Maximum Running Speed:** 100 m. per 2 sec.

**Hokkaido Wolf** is Gokusha's primary form accessed by using the Japanese River Otter Zetsumerisekey in the MetsubouJinrai Forceriser.

Hokkaido Wolf consists of the following parts:

* **Hokkaido Wolf Head** (エゾウルフヘッド, **Ezo Urufu Heddo**) - The helmet.
	+ **Hokkaido Wolf Ear** (エゾウルフイヤー, **Ezo Urufu Iyā**) - Gokusha's extended hearing sensor. It has an excellent tracking function by sound pattern detection, and can capture up to 16 targets simultaneously within a radius of 7km.
	+ **Hokkaido Wolf Goggles** (エゾウルフゴーグル, **Ezo Urufu Gōguru**) - Gokusha's facial armor. The armor that protects the face is equipped with a visual device and a hearing device to enhance its high-speed fighting ability.
	+ **Hokkaido Wolf Signal** (エゾウルフシグナル, **Ezo Urufu Shigunaru**) - The control device. The system operation status of the whole body is monitored from time to time to control energy allocation. Further, when the shock or the damage accumulated exceeding the expected damage level exceeds the limit, the wear is absorbed by releasing the wear to protect the wearer.
	+ **Crest Server** (クレストサーバ, **Kuresuto Sāba**) - The memory device. Has the role of collectively storing and managing data. The built-in data is converted by a special encryption technology, but a mechanism that destroys the stored data when it is physically separated works. This keeps the secret even if the enemy destroys it.
	+ **Hokkaido Wolf Scope** (エゾウルフスコープ, **Nihon Urufu Sukōpu**) - The visual device. By switching modes such as shading and night vision, the visibility is secured under all circumstances. In addition to this, it has a function of visualizing electromagnetic movements, and makes it clear where traps are by recognizing movements and movements that are originally invisible such as radio waves.
	+ **Hearing Back** (ヒアリングバック, **Hiaringu Bakku**): Gokusha's hearing device. Hearing information is communicated to the wearer through the Restraint Cables.
* **Rise Base Actor** (ライズベースアクター, **Raizu Bēsu Akutā**) - The bodysuit. It is composed of Zain Ceramic armor and is reinforced with a laminated exterior. It is equipped with many sensors. Furthermore, it is highly adaptable, able to change its abilities according to what Progrisekey is used.
	+ **Base Act Arm** (ベースアクトアーム, **Bēsu Akuto Āmu**) - The left arm. Due to it being a part of the Rise Base Actor, it amplifies the wearer's arm strength, allowing Vulcan to lift up to 4 tons.
	+ **Base Act Grab** (ベースアクトグラブ, **Bēsu Akuto Gurabu**) - The left hand. Punching power is amplified and the **Paw Pad Connector** (パウパッドコネクタ, **Pau Paddo Konekuta**) located on the palm synchronises with the A.I.M.S. Shotriser as well as the Vulcan Optical Visor.
	+ **Base Act Leg** (ベースアクトレッグ, **Bēsu Akuto Reggu**) - The left leg. Strengthens kicking power and improves running power.
	+ **Base Act Boot** (ベースアクトブーツ, **Bēsu Akuto Būtsu**) - The left foot. Jumping power is enhanced thanks to the **Paw Pad Soles** (パウパッドソールによ, **Pau Paddo Sōru**)
* **Main Blocker** (メインブロッカー, **Mein Burokkā**) - The chest armor. The data image **Lost Model** (ロストモデル, **Rosuto Moderu**) of the extinct species that is overloaded is forcibly installed. In addition to the structure with low observability, it gives the wearer the high agility of the Lost Model of the Japanese wolf. This makes it possible to perform covert actions alone, including invasion of bases and sabotage.
* **Restraint Cable** (レストランケーブル, **Resutoran Kēburu**): Cables running through all parts of the body that transmit energy and information from the MetsubouJinrai Forceriser. In addition, taking advantage of their high toughness and ability to expand and contract freely, they have the role of constraining the utilized Zetsumerisekey's Lost Model and tightly binding it to the wearer.

This form has two finishers:

* **Zetsumetsu Dystopia** (ゼツメツディストピア, *Zetsumetsu Disutopia*): Gokusha equips the Claw Assault and slashes the ground in front of him, freezing it. He then creates several copies of himself that burst into snow when attacked. Six of the copies attack the opponent from the front, while another appears behind them. While the enemy is distracted by the copies, the real Gokusha appears above them and performs a downward dive surrounded by blue energy with his claws positioned in front of him. Once the opponent grabs the claws, Gokusha breaks the right one off and punches the enemy, briefly encasing both of them in ice.
* **Zetsumetsu Utopia** (ゼツメツユートピア, *Zetsumetsu Yutopia*): Gokusha delivers a flying kick surrounded in blue and white energy.

**Kamen Rider Ark-Zero**

"Arkrise! (terrified screaming and distorted voices) All zero."
―Transformation announcement[src]
**Rider Statistics**:

* **Rider Height**: 196.0 cm
* **Rider Weight**: 122.4 kg

**Ability Parameters**:

* **Punching Power**: 47.6 t
* **Kicking Power**: 96.3 t
* **Maximum Jump Height**: 73.1 m
* **Maximum Running Speed**: 100 m per 0.8 seconds

Itami transforms into Kamen Rider Ark-Zero using the Ark Driver-Zero after being possessed by the Ark.

In this form, Ark-Zero's stats surpasses all Kamen Riders up till his appearance, but Zero-One MetalCluster Hopper still outclassed him in terms of maximum jump height. In addition, his kicking power is also slightly lower than RampageVulcan. Compared to his fellow followers, he is the strongest among them.

It is weaker compared to when he possessed Horobi at the moment, but is as strong as its original host an episode later. However, due to Itami's willpower, it can make Ark-Zero paralyzed for a short while.

Kamen Rider Ark-Zero is composed of the following parts:

* **Ark-Zero Head** (アークゼロヘッド, *Āku Zero Heddo*) - The helmet.
	+ **Zero Face** (ゼロフェイス, *Zero Feisu*): The face armor. It is equipped with an ultra-high-performance antenna and a visual/auditory device that are premised on AI processing. As for the shape, the minimum elements as a Kamen Rider are extracted based on statistical data, and rearranged efficiently.
	+ **Eclipse Eye** (エクリプスアイ, *Ekuripusu Ai*): The visual device on the right side. It is a collection of image sensors of different methods in a compound eye shape. By combining with image processing, various information such as thermography and X-ray photography can be extracted.
	+ **Zero Face Vision** (ゼロフェイスビジョン, *Zero Feisu Bijon*): The image information collection device on the left side. By invading the network, it collects video data from reconnaissance satellites, security cameras in the facility, AI-equipped devices such as Humagear. As a result, every place can have its own field of view.
	+ **Zero Face Ear** (ゼロフェイスイヤー, *Zero Feisu Iyā*): The voice information collection device. In addition to the auditory sensor that boasts a sound collection range of 10 km in radius, it will collect voice data from communication devices such as mobile phones and AI-equipped devices such as Humagear by entering the network. By filtering the collected data, any sound can be extracted and heard.
	+ **Zero Face Antennae** (ゼロフェイスアンテナ, *Zero Feisu Antena*): The single antennae. The directionality is changed according to the environment, and a smart antenna that can simultaneously send and receive multiple types of enormous information, such as communication with various electronic devices and radar function, is adopted. In addition to hacking various electronic devices from here, human control is performed using special interference waves that manipulate brain waves.
	+ **Ark Signal Zero** (アークシグナル ゼロ, *Āku Shigunaru Zero*): The red gem on the forehead. A control device for the Ark-Zero system. The forced interruption program **"Prisonment Chain"** (プリズメントチェイン, *Purizumento Chein*) checks the operating efficiency and malfunctions by intervening in the control system of the human gear under control, and makes adjustments as necessary to bring out the limits of the functions.
* **Zero Chest Gear** (ゼロチェストギア, *Zero Chesuto Gia*): The chest armor. It possesses the **Worm Terminal** (ワームターミナル, *Wāmu Tāminaru*) and the **Restraint Cable** (リストレントケーブル, *Risutorento Kēburu*) that can penetrate into various devices with excellent penetrating power, allowing it to create a bypass path with a controlled Humagear. As a result, the efficiency of information transmission and the energy flow rate can be increased to enhance the function of the human gear from the inside.
* **Zero Tector** (ゼロテクター, *Zero Tekutā*): The powered bodysuit. Similar to Kamen Rider Zero-One's MetalCluster Hopper "Amalgamate Tector", the Zero Tector is formed by enclosing the target with liquid metal released from the Arc Driver-Zero. The special metal possesses excellent toughness and wear resistance is filled with fluid metal as it is, and functions as armor while maintaining flexibility.
* **Zero Shoulder Gear** (ゼロショルダーギア, *Zero Shorudā Gia*): The shoulder armor. One miniaturized particle accelerator is mounted on each shoulder. Each group shares the nuclei and electrons, accelerates to sublight speed, and supplies them to the "zero hand gear" of the hand part to form a part of the heavy charged particle cannon.
* **Marchinis Arm** (マーキニースアーム, *Mākinīsu Āmu*): The arms. It possesses the power cable **"M string"** (Mストリング, *M Sutoringu*) from the Zero Tector is stretched around like a human nerve, and forcibly controls the arm of Huma Gear from the outside. As a result, it becomes possible to exhibit high motility that exceeds the potential of the human gear placed under control.
* **Zero Hand Gear** (ゼロハンドギア, *Zero Hando Gia*): The gloves. The sharp armor of the fingertips **"Spite Nail"** (スパイトネイル, *Supaito Neiuru*) has the function of generating attractive force by partially reversing the barrier deployed from the "Zero Thigh Gear" of the thigh, and strongly adsorbing all objects. Also, the irradiation shaping machine **"Beam Equipper"** (ビームエクイッパー, *Bīmu Ekuippā*) is equipped on the palm, and various data such as attach weapons are materialized by modeling beam. In addition, this irradiation port can be used as a part of a heavy charged particle cannon that emits in a beam shape by synthesizing electrons and nuclei supplied from the Zero Shoulder Gear.
* **Zero Thigh Gear** (ゼロサイギア, *Zero Saigia*): The thigh armor. An energy barrier generator **"Coulomb Generator"** (クーロンジェネレーター, *Kūron Jenerētā*) is built in and forms a coulomb barrier generated by manipulating electric charges on the armored surface of the whole body. This allows the physical attack to be dispelled by repulsive force.
* **Marchinis Leg** (マーキニースレッグ, *Mākinīsu Reggu*): The legs. The power cable "M-string" of the powered suit "Zero Tector" is stretched around like a human nerve, and forcibly controls the leg of the human gear from the outside. This makes it possible to activate a special move that boasts an astonishing destructive power that exceeds the potential of Huma Gear placed under control.
* **Zero Shin Gear** (ゼロシンギア, *Zero Shin Gia*): The shin armor. The internal energy condenser **“Zero Annihilator”** (ゼロアナイアレイター, *Zero Anaiareitā*) has the role of temporarily storing the energy supplied from Arc Driver-Zero when activating a special move, and discharging a large amount of energy at once.
* **Zero Foot Gear** (アークゼロヘッド, *Zero Futto Gia*): The boots. When the Special Move is activated, the anti-annihilation field can be expanded to convert the substance that becomes a resistance or obstacle into energy. This invalidates the physical defenses and at the same time improves the destructive power of the kick.

Kamen Rider Ark-Zero's finisher is the **All Extinction** (オールエクスティンクション, *Ōru Ekusutinkushon*):

* Ark-Zero leaps into the air before channeling red and black energy into his leg and delivering a flying kick to the opponent.
* Ark-Zero paralyzes the opponent with malicious kanji before telekinetically raising them into the air within tendrils of liquid metal. He then raises his arm and closes his fist, causing the liquid metal to explode along with the opponent.

**Appearances:**

* Hokkaido Vulcan

**Hokkaido Vulcan**

"Shotrise! Special Limited Edition! Kamen Rider Hokkaido Vulcan! That's my rule."
―Transformation announcement[src]
**Rider Statistics:**

* **Rider Height:** 199.7 cm
* **Rider Weight:** 121.3 kg

**Ability Parameters:**

* **Punching Power:** 47.2 t.
* **Kicking Power:** 105.6 t.
* **Maximum Jump Height:** 66.1 m.
* **Maximum Running Speed:** 100 m. per 2 sec.

**Hokkaido Wolf** is Vulcan's extra final form form accessed by using the Hokkaido Wolf Zetsumerisekey in the A.I.M.S. Shotriser.

Much like with Orthros Vulcan and Justice Serval, since the form uses a Zetsumerisekey to force the transformation rather than a Progrisekey, it is extremely unstable as a consequence.

* This form has two finishers:
	+ **Hokkaido Blast** (エゾウブラースト, **Hokkaido Burasuto**): Vulcan fires four blue energy constructs of wolf heads from the Shotriser that attach to the enemy's limbs and crash it into a nearby surface, followed by the energy heads transforming into energy pins and securing the target in place. Vulcan then charges the Shotriser and fires a ball of blue energy that melts through everything in its path, including the enemy.
	+ **Hokkaido Blast Fever** (エゾウブラーストフィーバー, **Hokkaido Burasuto Fībā**): Vulcan somersaults into the air with his right foot covered in white and blue energy, which forms into an energy construct of a wolf's head. He then delivers a downward kick to the enemy with the wolf head crushing the target in its jaws.

This form is exclusive to *Kamen Riders and the Books Dream n' Nightmares*

Gokusha transforms into several past Legend Riders as part of the **Clone Rider** (クローンライダー, **Kurōn Raidā**) system developed by Professor Weirdo of the year 2071.

* Thunder

**Kamen Rider Thunder**
 File:KRXV-Thunder.png
Gokusha temporarily transforms into **Kamen Rider Thunder** with the help of the Clone Rider system.

This form is exclusive to *Kamen Rider: Future Generations and Beyond*

## Equipment

### Devices

* MetsubouJinrai Forceriser - Main transformation device
* Progrisekeys - Transformation trinkets
* Progrise Holder - Carrying straps for Progrisekeys
* Ark Driver-Zero - Transformation device as Kamen Rider Ark-Zero
* A.I.M.S. Shotriser - Transformation device for Vulcan

### Weapons

* Authorise Buster - Gokusha's Primary Weapon
* Attache Shotgun - Gokusha's Secondary Weapon

## Relationships

	+ Jin/Kamen Rider Jin: They are enemies due Kamen Rider MetsubouJinrai.
	+ Horobi/Kamen Rider Horobi: They are enemies due Kamen Rider MetsubouJinrai.
	+ Uchuyaro Raiden/Kamen Rider Ikazuchi: They are enemies due Kamen Rider MetsubouJinrai.
	+ Gai Amatsu/Kamen Rider Thouser:
	+ Naki/Kamen Rider Naki: They are enemies due Kamen Rider MetsubouJinrai.
	+ Zyugo/Kamen Rider Syncnet: Gokusha only knows him as Kura's Killer.

## Notes

* Azu's result of Gokusha's singularity test is as follows:
	+ He stands at 164 cm, making him a little shorter than his actor.
	+ His Humagear No. is 0090.
	+ His operating system is ZS004, which makes him the fourth member of the Zetsumetsu Squad.