Kamen Rider Sigma

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 .
Kamen Rider Sigma may refer to any the following characters.
Nopicture.jpg| Brett Phase (Primary)
Nopicture.jpg| Yuki Kikuchi (Mantis Orphnoch)
Nopicture.jpg| Victor (Cobra Orphnoch)
Nopicture.jpg| Makoto (Jaguar Orphnoch)
Nopicture.jpg| Āshindo Shinobu (Condor Orphnoch)
Nopicture.jpg| Kage Phase (Kamen Rider Neo-Sigma/Horse Orphnoch)
Nopicture.jpg| Brett Megami (A.R. World)
Nopicture.jpg| Sharon Phase (Movie)
Nopicture.jpg| Kamen Rider Bujin Sigma
===Manga===
Nopicture.jpg|Jibanyan (215) (Manga, First user)
Nopicture.jpg|Blazion (215) (Manga, Second user)
Nopicture.jpg|Komasan (215) (Manga, Third user)
Nopicture.jpg|Kyubi (215) (Manga, Fourth user)
Nopicture.jpg|Blizzaria (215) (Manga, Fifth user)
Nopicture.jpg|Orochi (215) (Manga, Sixth user)
Nopicture.jpg|Nekomata (215) (Manga, Seventh user)
Nopicture.jpg|Whisper (215) (Manga, Eighth user)
Nopicture.jpg|Komajiro (215) (Manga, Ninth user)
Nopicture.jpg|USApyon (215) (Manga, Tenth user)
Nopicture.jpg|Hovernyan (215) (Manga, Eleventh user)
Nopicture.jpg|Lord Enma (Manga, Twelfth user)
Nopicture.jpg|Brett Phase (Primary/Thirdteenth User)
==Sigma Gear==
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 FormKomaGalaxy (Blaster Form Only/Eighth User)
Kamen Rider Sigma (Shadowpyon22).png|Yo-kai Kamen Rider SigmaShadowpyon22 (Eleventh user)
Shadowside Rider Sigma.png|Shadowside Rider SigmaShadowpyon22 (Shadowside) (Twelfth user)
Kamen Rider Sigma (ボス妖怪).png|Kamen Rider Sigma (ボス妖怪)CaptainWalker22 (Thirteen user)
==Derivations==
KRDCD-Decadesigma.png|Kamen Rider Decade Sigma
Nopicture.jpgKamen Rider Ghost Sigma Damashii
Nopicture.jpgKamen Rider Ichinisan SigmaArmor
Nopicture.jpg|Another Sigma
==Forms==
==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==
==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.
Category:Kamen Riders
Category:215 Riders
Category:Non-human Riders
Category:Riders with more than one identity
Category:Series 2 Riders