Kamen Rider Sigma

**Kamen Rider Sigma** (仮面ライダーシグマ, *Kamen Raidā Shiguma*) or **SB-215 Sigma** (SB standing for Smart Brain) is the main protagonist of *Kamen Rider 215*. Its gear is the first of the Rider Gears seen in the series. Its motif is based on the Greek letter sigma (Σ).

Kamen Rider Sigma may refer to any the following characters.

 Brett Phase (Primary) Yuki Kikuchi (Mantis Orphnoch) Victor (Cobra Orphnoch) Makoto (Jaguar Orphnoch) Āshindo Shinobu (Condor Orphnoch) Kage Phase (Kamen Rider Neo-Sigma/Horse Orphnoch) Brett Megami (A.R. World) Sharon Phase (Movie) Kamen Rider Bujin Sigma

### Manga

Jibanyan (215) (Manga, First user)Blazion (215) (Manga, Second user)Komasan (215) (Manga, Third user)Kyubi (215) (Manga, Fourth user)Blizzaria (215) (Manga, Fifth user)Orochi (215) (Manga, Sixth user)Nekomata (215) (Manga, Seventh user)Whisper (215) (Manga, Eighth user)Komajiro (215) (Manga, Ninth user)USApyon (215) (Manga, Tenth user)Hovernyan (215) (Manga, Eleventh user)Lord Enma (Manga, Twelfth user)Brett Phase (Primary/Thirdteenth User)

## Item Information

### Number of Episode Appearances

TBA (215)
TBA (Movies)
TBA (Specials)
*Full list of appearances*

The Sigma Gear was a set of Kamen Rider Gear developed by the Smart Brain Corporation to protect the Orphnoch King. The Sigma Gear had less power than the original Delta Gear, but had a much greater functionality. Unlike most of the Rider Gears that Smart Brain developed, the Sigma Gear doesn't need Orphnoch DNA to function. However overusing the gear can lead to body strain.

## Users

### Original Series

* Brett Phase
* Yuki Kikuchi (Mantis Orphnoch)
* Victor (Cobra Orphnoch)
* Makoto (Jaguar Orphnoch)
* Āshindo Shinobu (Condor Orphnoch)
* Kage Phase (Horse Orphnoch)
* Sharon Phase

In the original *Kamen Rider 215* series, its first known, and primary wearer is Brett Phase.

The Sigma Gear was stolen and utilized (all on different occasions) by Yuki Kikuchi, Victor, and Makoto. Āshindo Shinobu used the gear once to trick Kage and Brett into thinking they betrayed each other.

By the end of the series, the Gear was still intact.

### A.R. World

* Brett Megami

In an alternate version of reality where *Kamen Rider 215* takes place that appeared in *Kamen Rider Decade: Other Worlds and Beyond*, the Sigma Gear is only shown to be used by Brett Megami himself.

## Variants

Kamen Rider Sigma Blaster Form (KomaGalaxy).png**Kamen Rider Sigma Blaster Form**
KomaGalaxy (Blaster Form Only/Eighth User)Kamen Rider Sigma (Shadowpyon22).png**Yo-kai Kamen Rider Sigma**
Shadowpyon22 (Eleventh user)Shadowside Rider Sigma.png**Shadowside Rider Sigma**
Shadowpyon22 (Shadowside) (Twelfth user)Kamen Rider Sigma (ボス妖怪).png**Kamen Rider Sigma (ボス妖怪)**
CaptainWalker22 (Thirteen user)

## Forms

* Default
* Axel
* Blaster
* Final Form Ride

**Kamen Rider Sigma**

"Complete!"
―Transformation announcement[src]
**Rider Statistics**

* **Rider Height**: 186 cm.
* **Rider Weight**: 94 kg.

**Rider Senses**:

* **Hearing**: 20 km.

**Ability Parameters**:

* **Punching Power**: 4.5 t.
* **Kicking Power**: 8 t.
* **Maximum Jump Height**: 55 m.
* **Maximum Running Speed:** 100 m. per 5.8 sec.

**Special Attacks**:

* **Grand Impact**: 15.2 t.
* **Blue Bomber**: 27 t.

Once transformation is completed, the Sigma Armor has several key features in its design to offer protection to the user. Like all Rider gears, the Sigma armor manifests when the Sigma Driver generates **Photon Blood**, a glowing substance generates the soft **Sol Foam** suit, **Sol Metal** armor, and **Fullmetal Lung** chest armor via traveling through the blue *Photon Streams* that ends at the *Photon Terminals* at the gauntlet and **Power Anklet** greaves, the right Anklet having a **Energy Holster** that the Sigma Pointer can be connected to. The helmet is unique due to its **Global Feeler** antenna to link up to Smart Brain's networks and **Ultimate Finder** visor that gives Sigma incredible vision to see in darkness, giving the illusion of a glowing eye, and a limited amount of x-ray vision.

**Axel Form**

"Complete!"
―Transformation announcement[src]
**Rider Statistics**

* **Rider Height**: 186 cm.
* **Rider Weight**: 94 kg.

**Ability Parameters**:

* **Punching Power**: 3.75 t.
* **Kicking Power**: 7.5 t.
* **Maximum Jump Height**: 52.5 m.
* **Maximum Running Speed**: 100 m. per 0.0058 sec.

**Special Attacks**:

* **Grand Impact**: 27.8 t.
* **Strengthened Blue Bomber**: 35.5 t.

Axel Form (アクセルフォーム, *Akuseru Fōmu*) is a temporary transformation that allows Sigma to move at the speed of sound for roughly 10 seconds. His physical attacks are also boosted, and he is able to perform multiple Exceed Charges in quick succession.

Sigma transforms into Axel Form from his default form by wearing the Aigma Axel and swapping its Axel Mission Memory with the Sigma Driver's Sigma Mission Memory. When this is performed, the Full Metal Lung chest plates will open to reveal the Sigma Core in the center of Sigma's chest. The Photon Streams then turn silver and the Ultimate Finder turns green.

After 10 seconds, Sigma reverts to his default form the Mission Memories are returned to their original locations. The transformation presumably fatigues Sigma, as he has never been shown performing twice in a single fight.

**Blaster Form**

"Awakening!"
―Transformation announcement[src]
**Rider Statistics**

* **Rider Height**: 186 cm.
* **Rider Weight**: 94 kg.

**Rider Senses**:

* **Hearing**: 30 km.

**Ability Parameters**:

* **Punching Power**: 4 t.
* **Kicking Power**: 8 t.
* **Maximum Jump Height**: 55 m.
* **Maximum Running Speed**: 100 m. per 5 sec.

Special Attacks:

* **Grand Impact**: 8.1 t.
* **Strengthened Blue Bomber**: 45 t.

By inserting the Sigma Phone into the Sigma Blaster briefcase and entering the transformation code again, Sigma can access Blaster Form (ブラスタフォーム, *Burastā Fōmu*), the most powerful form of the Sigma Gear. The amount of Photon Blood that the Sigma Gear produces increases to the extreme where it overflows from the Photon Streams and spreads itself over the Sol Foam and the Sol Metal, changing their color to blue. sigma also receives a new, more powerful, set of Full Metal Lung with a backpack like device attached to it called Photon Field Floater (フォトンフィールドフローター, *Foton Fīrudo Furōtā*) that releases constant waves of Photon energy to give Sigma Blaster flying capacities. By focusing the release pattern however, the thrusters of the Photon Field Floater can be used as powerful energy cannons called the Bloody Cannons (ブラッディ・キャノン, *Buraddi Kyanon*). Sigma's signature Blue Bomber attack has been powered up significantly. The Blaster Blue Bomber is so tremendously powerful that damaging Photon Energy waves radiate from the point of impact and destroy everything around it.

All of these new abilities and more, except for his Blue Bomber kick which can be performed without the Sigma Pointer, are accessed by inputting codes into the Sigma Blaster, which also holds the Sigma Phone and can transform into Blaster and Blade modes for the Photon Blaster and Photon Breaker Exceed Charges.

**Sigma Blaster**

"Final Form Ride: Sig-Sig-Sig-Sigma!"
―Transformation announcement[src]
**Rider Statistics**

* **Rider Length**: 245 cm.
* **Rider Weight**: 91 kg.

Kamen Rider Decade's Final Form Ride allows Faiz to change into **Sigma Blaster** (シグマブラスター, **Shiguma Burasutā**), which can use the **Decade Photon** attack to defeat the enemy.

## Equipment

* SB-215B Sigma Driver - Sigma's transformation belt.
	+ SB-215P Sigma Phone'- The control unit of the Sigma Gear.
		- Sigma Mission Memory - A small metallic card key containing the information of the Simga Armor.
* SB-215C Sigma Shot - Digital camera-shaped knuckle-duster.
* SB-215L Sigma Pointer - A laser pointer which enables to produce an energy drill deathblow.
* SB-215H Sigma Edge - A lightsaber-like sword that can be stored in TriWalker.
* SB-215W Sigma Axel - A stopwatch that enables to gain access to Axel Form.
	+ Axel Mission Memory - A small metallic card key containing the information of the Sigma Axel Armor.
* SB-215T Sigma Blaster - A large modern Trunk Trunkbox-shaped laser cannon/sword that enables to gain access to Blaster Form.
* SB-215V TriWalker - Sigma's motorcycle that can transform in a robot-like Battle Mode.
* SB-VX0 Jetsliger - A heavily-armed combat motorcycle.

## Legend Rider Devices

* Rider Card
* Lockseed
* Signal Bike
* Ghost Eyecon
* Ridewatches

*Several Rider Cards allow Tsukasa Kadoya/Kamen Rider Decade to access the power of Sigma.*

* Kamen Ride
* Form Ride
* Attack Ride
* Final Kamen Ride
* Final Form Ride
* Final Attack Ride

"Kamen Ride: Sigma! Complete! (Sigma Driver transformation sound)"
―Transformation announcement[src]
Transforms Decade into Faiz, initially sealed after being used once. Regained when Tsukasa teaches Brett that protecting those dear to him matters regardless of who he is. Sometime, Decade can summon Sigma Edge without using Attack Ride card TriWalker.

Kamen Ride: SigmaDecade Sigma

"Form Ride: Sigma Axel! (Axel Watch transformation sound)"
―Transformation announcement[src]
* **Sigma Axel**: Decade assumes Sigma's Axel Form. While in the original series, this form moved at the speed of sound for only 10 seconds, Decade's version is not affected by a time limit and allows him to match the Worms and the ZECT Riders' Clock Up system, which moves at the speed of light.

These cards allow Decade to perform any of their own attacks, Decade is also able to use any signature attacks of whatever Kamen Rider he has transformed into.

* **TriWalker**: As Sigma, Decade turns the Machine Decader into the TriWalker, Sigma's own motorcycle, which goes into Battle Mode. This also allows Decade to access the Sigma Edge via the TriWalker's right shoulder.

When Kamen Rider Decade is in his Complete Form, he uses the K-Touch to summon the Final Forms of the Nine Heisei Riders. After he presses the Rider's symbol, a card of that Rider's Final Form appears in a set of nine on Kamen Rider Decade's chest. The Sigma Blaster card summons Kamen Rider Sigma Blaster Form, armed with the Sigma Blaster. Using the Sigma Final AttackRide card allows Decade to execute a Photon Buster-style attack alongside Sigma Blaster Form.

The **Sigma Blaster** card transforms Sigma into a large laser cannon, similar in appearance to Sigma's own Sigma Blaster weapon.

With the Sigma Blaster, Decade shoots an energy drill at the enemy before performing the **Decade Photon**, a powerful laser blast with some recoil, which is similar to Sigma's Crimson Smash kick.

* Sigma
* Blaster

* **Sigma Lockseed** (シグマロックシード, **Shiguma Rokkushīdo**): Allows the user to transform into Sigma Arms, equipped with the Sigma Edge. The core image depicts the Sigma Driver while the lid backside image depicts the Phone. Bravo/Knuckle-styled Lockseed.
	+ Transformation: **Sigma Arms: Mr. Extreme!** (シグマアームズ・ミスターエクストリーム！, **Shiguma Āmuzu - Misutā Ekustorīmu!**)
		- Squash: **Exceed Charge!** (エクシードチャージ！, **Ekushīdo Chāji**)
		- Au Lait: **Sigma Edge!** (シグマエッジ！, **Shiguma Ejji**)
		- Sparking: **Blue Bomber!** (ブルーボンバー, **Burū bonbā**)

Sigma Lockseed (locked & closed)Sigma Lockseed (locked & opened)

* **Sigma Blaster Form Lockseed** (シグマブラスターフォームロックシード (*Shiguma Burastā Fōmu Rokkushīdo*, ***Sigma Blaster Form Lockseed** (シグマブラスターフォームロックシード*): Allows the user to transform into the Blaster Form version of Sigma Arms. The core image depicts the Sigma Driver without the Sigma Phone while the lid backside image depicts the folded-up Sigma Blaster. Bravo/Knuckle-styled Lockseed. When activated, this Lockseed announces "Blaster" (ブラスター, **Burastā**).
	+ Transformation: **Sigma Arms: Blaster Awakening!** (シグマアームズ・ブラスターアウェイクニング！, **Shiguma Āmuzu - Burastā Aueikuningu!**)
		- Squash: **Photon Buster Mode** (フォトンバスターモード！, **Foton Basutā Mōdo**)
		- Au Lait: **Photon Breaker Mode** (フォトンブレイカーモード！, **Foton Bureikā Mōdo**)
		- Sparking: **Super Strengthened Blue Bomber** (超強化ブルーボンバー！, **Chō Kyōka Burū bonbā**)

Sigma Blaster Form Lockseed (locked & closed)Sigma Blaster Form Lockseed (locked & opened)

**Signal Legend Sigma** (シグナルレジェンドシグマ, **Shigunaru Rejendo Shiguma**, Based on Kamen Rider Sigma' TriWalker): Allows Mach to activate a Kourin Signal Legend. When used in the DX Drive Driver, it gives the sound for a Tire Exchange into **Drive: Sigma** (ドライブ・シグマ, *Doraibu - Shiguma*, ***Drive: Sigma***).

"Kaigan! Faiz! (Faiz Phone dial tones) Keitai bangō! 5-5-5! (Faiz Driver's "Complete" transformation noises)"
―Transformation announcement with Ghost Driver[src]
**Sigma Ghost Eyecon** (シグマゴースト眼魂, **Shiguma Gōsuto Aikon**) is one of the Extra title Kamen Riders' Ghost Eyecons. It shows the number **R04** on its Startup Time setting, Sigma's face on its Transformation Time setting, and Sigma's symbol on its Move Invocation Time setting.

Sigma Ghost EyeconSigma GhostTop StickerStandby TimeStartup TimeMove Invocation Time

* Sigma
* Axel
* Blaster
* Anotherwatch

* 1
* 2
* 3
* 4
* 5

"(digital beeping) Sigma!"
―Activation announcement[src]
"The transformation code is 2-1-5! The Rider who transforms with a cellphone is... (Clock ticking noise) Sigma!"
―Secondary activation announcement[src]
"Rider Time! (Pop music) Complete! Sigma!"
―Transformation announcement in the Ziku-Driver's right-hand slot[src]
"(Right-hand Ridewatch's announcement)! Armor Time! (Pop music) Complete! Sigma!"
―Rider Armor transformation announcement[src]
"Finish Time! Sigma! Exceed Time (Break/Burst/Jack)!"
―Rider Armor finisher announcement[src]
**Sigma Ridewatch** (シグマライドウォッチ, **Shiguma Raidowotchi**): Based on Kamen Rider Sigma, this Ridewatch provides access to the SigmaArmor used by Ichinisan. It is dated *2003*.

It was presumably manifested by **Brett Phase** from a Blank Watch given by Begin.

Sigma Form RidewatchSigma Form Ridewatch (Inactive)

* 1
* 2
* 3
* 4
* 5

"(digital beeping) Sigma Axel Form!"
―Activation announcement[src]
"Start up! Sigma's speed has been increased with the Axel Watch! Sigma Axel Form!"
―Secondary activation announcement[src]
"Rider Time! (Axel Watch start up sound) Start up! Sigma Axel! (Axel Watch time out sound)"
―Transformation announcement in the Ziku-Driver's right-hand slot[src]
"(Right-hand Ridewatch's announcement)! Armor Time! (Axel Watch start up sound) Start up! Sigma Axel! (Axel Watch time out sound)"
―Rider Armor transformation announcement[src]
"Finish Time! Sigma! Exceed Time (Break/Burst/Jack)!"
―Rider Armor finisher announcement[src]
**Sigma Axel Form Ridewatch** (シグマファイズアクセルフォームライドウォッチ7, **Shiguma Akuseru Fōmu Raidowotchi**): Based on Kamen Rider Sigma Axel Form, this Ridewatch would provide access to the FaizAxelFormArmor. It is dated *2003*.

Sigma Axel Form RidewatchSigma Axel Form Ridewatch (Inactive)

* 1
* 2
* 3
* 4
* 5

"(digital beeping) Sigma Blaster Form!"
―Activation announcement[src]
"Awakening! The blue body of maximum output! Strengthened to the limit! Sigma Blaster Form!"
―Secondary activation announcement[src]
"Rider Time! *(Remix of* Extreme Game*) Chou energy! Sigma Blaster! Awakening!*"
―Transformation announcement in the Ziku-Driver's right-hand slot[src]
"(Right-hand Ridewatch's announcement)! Armor Time! *(Remix of* Extreme Game*) Chou energy! Sigma Blaster! Awakening!*"
―Rider Armor transformation announcement[src]
"Finish Time! Sigma! Blaster Time (Break/Burst/Jack)!"
―Rider Armor finisher announcement[src]
**Sigma Blaster Form Ridewatch** (シグマブラスタフォームライドウォッチ, **Shiguma Burastā Fōmu Raidowotchi**): Based on Kamen Rider Sigma Blaster Form, this Ridewatch would provide access to the SigmaBlasterFormArmor. It is dated *2003*, but shown on the Ziku-Driver's screen as *FIN.*

Sigma Blaster Form RidewatchSigma Blaster Form Ridewatch (Inactive)

* 1
* 2
* 3
* 4
* 5

"Sigma! (Distorted digital beeping)"
―Activation announcement[src]
"Sigma!"
―Another Rider transformation announcement[src]
"Another Time! (Another Rider name)!"
―Transformation announcement in the Ziku-Driver's right-hand slot[src]
"(Right-hand Ridewatch's announcement)! Another Time! (Another Rider name)"
―Transformation announcement in the Ziku-Driver's left-hand slot[src]
"Finish Time! (Another Rider name)! Another Time (Break/Burst/Jack)!"
―Finisher announcement in left-hand slot[src]
**Another Sigma Watch** (アナザーシグマウォッチ, **Anazā Shiguma Wotchi**): A twisted version of the Sigma Ridewatch used to transform into Another Sigma.

## Notes

* The name of Sigma's Axel Form may refer to the "axle" (different spelling; "axel" is a figure skating move named after a person) that a vehicle's wheels spin on to move, or may be a mistaken Romanization of "accel(erate)", meaning to change speeds, usually to become faster. The latter makes sense because Axel Form's ability is a burst of super speed, and it is later also used for Kamen Rider Accel.
* Sigma has the most known users at 9 users.
* Sigma is the safest Gear compared to other Smart Brain Gears as it does not cause as much side effects as the other Gears.
	+ It's only side effect is overusing it as doing the transformation again after taking severe damage will give the user body strain if they try to use again.