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Icon-faiz.png This article is about an orphnoch/temporary rider in Kamen Rider 555.

Naoya Kaido (海堂 直也, Kaidō Naoya), also known as the Snake Orphnoch (スネークオルフェノク, Sunēku Orufenoku) is the third member of Kiba's group in Kamen Rider 555. He briefly used the Riotrooper belt.

Naoya Kaido


He is a 22-year-old man with an overly eccentric personality prone to incredibly fast speeches and constant mood swings. Kaido is often inconsiderate and selfish, but he's always been straight-up and honest about his feelings with people in his life. His greatest past-time is to play his guitar, but due to his hand injury, it often reminds him of the regrets he had as a human.

TV Series

He played the guitar in his younger days, but sabotage from his teacher destroyed some of the motor-skills in his left hand, forcing him to abandon his music. He is later made a 'sired' Orphnoch by Eiichi Toda as an example to Kiba and Yuka of how Orphnoch must make allies, using a snap of his finger to trigger his transformation into Snake Orphnoch (スネークオルフェノク, Sunēku Orufenoku). Learning of the changes after his enhanced ability to smell cost him a part-time job and being targeted by a corrupt employer, Kaido decides to abuse his power for personal gain when he encountered Faiz, with Kiba coming to his aid.

He greatly mistreats Yuka accidentally due to her crush on him. Continuing to struggle with his nature as an Orphnoch, Kaido ends up living with Kiba and Yuka, although he is the least concerned about protecting humans. At times he sides with Smart Brain over Kiba and Yuka, but his powerful and soft-hearted conscience often stops him from committing heinous acts at the last second. He eventually develops a partnership with Keitaro, which results in many harebrained schemes to win the respected woman of their desire, and bonded with Teruo. He briefly wore one of the six Riotrooper gears under Kiba's term in Smart Brain, the two switched roles, with Kaido throwing away his Riotrooper belt at Kiba out of disgust for his friend's new attitude.

Kaido would later save and befriend an orphaned boy, Teruo Suzuki, from a fire. Little did he know it's the future Orphnoch King. Eventually, Kaido's and his friends eventually figured out that Terou is the messiah the Orphnochs has been waiting for and the Kamen Riders face them in a final epic battle. Unfortunately, both Naoya (as Snake Orphnoch) and Mihara (as Delta) are powerless to stop the Arc Orphnoch as it took Faiz and all of the riders to stop him. After the final battle, Naoya watches the orphanage (now run by Mihara and Rina) before he departs for an unknown destination.

Paradise Lost

In the movie, Kaido, Yuka, and Kiba were on humanity's side. However, the humans didn't trust the Orphnnochs and demanded proof of their loyalty by sabotaging Smart Brain. Unfortunately, it was a trap by Smart Brain and the trio was brutally defeated by Smart Brain's most powerful creation, the Elasmotherium Orphnoch. Yuka was mortally wounded and Kaido tended to her as she faded away. It was in their final moments that Kaido confessed his love for Yuka. Not long after Yuka expired, Kaido ran a suicide attack and was eaten alive by the Elasmotherium Orphnoch. Kiba, being the only survivor was recovered, but also tricked into thinking that it was the humans that deceived them and vowed revenge for his friends.

D-Video Special: Kamen Rider 4

Faiz vs Snake Orphenoch

Before the last time looping after Shinnosuke died to prevent Go's fate from being killed in the first episode, Kaido was seen watching Drive's dead body while also watching Faiz and Zeronos battle three Shocker's remnants. Deathmatch! The Kamen Rider Died Three Times!!

Not wishing for Takumi to die again, Naoya revealed himself to Takumi, asking him to stop interfering in Shocker's plans. With Takumi unable to comprehend Naoya's words, the latter decides to stop him as the Snake Orphnoch. Suddenly though, Go as Mach arrives to stop Naoya, attacking him several times. Immediately, Takumi stops Go's onslaught, with Naoya retreating.

Later, Naoya reveals to Yuto and Shinnosuke that the time loop was being caused by Takumi's feelings of grief; with it also allowing Takumi to remain alive. Through his conversation, Naoya asks the two Riders to stop their investigation, telling them that Takumi had fought enough, and did not deserve to die again.

Ultimately. in a last ditch effort, Naoya faces Takumi in battle, trying to stop him from destroying Shocker's time modifying machine. Despite his efforts, Naoya is killed by Takumi's Exceed Charge, with Naoya calling Takumi a fool in his last breath.

Once Takumi sacrificed his life to destroy the timeline modifier, Naoya is revived as well, acting as his usual quirky self. In a solemn voice though, Naoya speaks to Takumi, revealing that he still remembered everything.

Video Game appearances

Kamen Rider 555 video game

The Snake Orphnoch is one of several Orphnoch who are playable in the Kamen Rider 555 video game.


Snake Orphnoch


  • Height: 209 cm.[1]
  • Weight: 130 kg.[1]

In his Orphnoch form, he is themed after a venomous snake. He has never revealed his second Orphnoch form, but he can spit acidic venom at his opponents. Kaido always assist Mihara on fighting Orphnochs in this form.

Powers and Abilities

  • Human Mode: As all his race, he can transform from human to Orphnoch.
  • Creation of Orphnoch: As Orphnoch, he can used his tentacle or weapon for eliminated the hearts of the victims in burst of flames.
  • Superhuman strength: He has great physical strength.
  • Superhuman Speed: He has great speed, used in the battles.
  • Superhuman smell: He can smell anything and know the past actions of his opponents.


  • Blades: He has two blades with handle as ring-form.

Kamen Rider Faiz

Kamen Rider Faiz

―Transformation announcement[src]

Rider Statistics

  • Rider Height: 186 cm.[2]
  • Rider Weight: 91 kg.[2]

Rider Senses:

Ability Parameters:

  • Punching Power: 2.5 t.[2]
  • Kicking Power: 5 t.[2]
  • Maximum Jump Height: 35 m.[2]
  • Maximum Running Speed: 100 m. per 5.8 sec.[2]

Special Attacks:

Once the transformation is completed, the Faiz Armor has several key features in its design to offer protection to the user. Like all Rider gears, the Faiz armor manifests when the Faiz 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 red Photon Streams that ends at the Photon Terminals at the gauntlets and Power Anklet greaves, the right Anklet having a Energy Holster that the Faiz 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 Faiz incredible vision to see in darkness, giving the illusion of a glowing eye, and a limited amount of x-ray vision.

Appearances: 555 Episodes 9-10



―Transformation announcement[src]

Rider Statistics

  • Rider Height: 175[7]~195 cm.[7]
  • Rider Weight: 85[7]~120 kg.[7]

Ability Parameters:

  • Punching Power: 2 t.[7]
  • Kicking Power: 4 t.[7]
  • Maximum Jump Height: 25 m.[7]
  • Maximum Running Speed: 100 m. per 6.5 sec.[7]

The Smart Buckle generates armor with several key features:

  • Full Metal Lung: The vest armor of the Rider provides the most protection, being able to withstand Anti-tank weaponry.
  • Global Feeler: The antenna on the Rider’s head can be used to communicate with the Smart Brain Satellite and the Smart Brain computer network.
  • Photon Blood: A glowing substance that provides all of the Rider’s powers and generates all of the physical features of the armor. The Photon Blood is generated from the Smart Buckle.
  • Photon Streams: The path that the Photon Blood travels through the Rider’s armor. In all Riotroopers, this path is yellow when transforming, white after transformed.
  • Photon Terminals: Where the Photon Streams connect with the gauntlets and greaves.

Appearances: 555 Episodes 47-48


Behind the scenes


Naoya Kaido is portrayed by Mitsuru Karahashi (唐橋 充, Karahashi Mitsuru) who later played Juzo FuwaIcon-crosswiki.png in Samurai Sentai ShinkengerIcon-crosswiki.png and later Miyamoto Musashi in Kamen Rider Ghost and Hayato Fukamiya in Kamen Rider Saber. As the Snake Orphnoch, his suit actors were Hideki Hatsu (葉都 英樹, Hatsu Hideki) and Keizo Yabe (矢部 敬三, Yabe Keizō).

Concept Art

Snake Orphnoch concept art

Snake Orphnoch was designed by Tamotsu Shinohara (篠原 保, Shinohara Tamotsu).



  1. 1.0 1.1 TV Asahi. (2003). Snake Orphnoch.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 TV Asahi. (2003). Kamen Rider Faiz.
  3. Kodansha. (2003). Masked Rider 555: Illustrated Super Encyclopedia. p. 4, 16. ISBN 978-4063044935.
  4. 4.0 4.1 4.2 Tokuma Shoten. (2003). Masked Rider Faiz 1. p. 7, 10. ISBN 978-4197605378.
  5. 5.0 5.1 Shogakukan. (2003). Masked Rider 555: Complete Works. First Volume. p. 16. ISBN 978-4091014917.
  6. 6.0 6.1 Kamen Rider Official Data/Perfect File.
  7. 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 TV Asahi. (2003). Riotrooper.

See also

Icon-faiz.png Kamen Rider 555
Kamen Riders
Kamen Rider Faiz: Takumi Inui - Yuji Kiba - Akai - Naoya Kaido - Itsuro Takuma - Masato Kusaka
Kamen Rider Kaixa: Masato Kusaka - Kouta Takamiya - Kiyotaka Nishida - Takahisa Shindo - Saeko Kageyama - Yuji Kiba - Keitaro Kikuchi (Paradise Lost) - Higashino (Manga) - Nishijima (manga) - Mayu (manga) - Kaixa Corps (manga) - Nozomi Munemiya (manga)
Kamen Rider Delta: Shuji Mihara - Saya Kimura - Kitazaki - Masato Kusaka - Takumi Inui - Rina Abe - Kyouji Murakami - Kyosuke Tokumoto - Ken Arai - Yuki Kawachi - Kikyou Nonomura (manga)
Riotrooper - Leo - Yuji Kiba
Stageshow-exclusive: Takuma Itsurou - Kamen Rider Beta - Kamen Rider Gamma - Dark Rider - Dark Slasher
Rider Arsenal
Mission Memories - Smart Pad
Faiz (Φ): Faiz Driver - Faiz Phone - Faiz Pointer- Faiz Shot - Faiz Edge - Faiz Axel - Faiz Blaster - Faiz Sounder
Kaixa (Χ): Kaixa Driver - Kaixa Phone - Kaixa Pointer - Kaixa Blaygun - Kaixa Shot
Delta (Δ): Delta Driver - Delta Phone - Delta Mover - Delta Blaster
Riotroopers (O): Smart Buckle - Axel Ray Gun - Flying Attacker (Decade)
Psyga (Ψ): Psyga Driver - Psyga Phone - Psyga Tonfa Edge - Flying Attacker
Orga (Ω): Orga Driver - Orga Phone - Orga Stlanzer
Concept Systems
Kamen Rider Neo-Alpa (α) - Kamen Rider Seeda (ϑ) - Kamen Rider Pyron (π)
Auto Vajin - Side Basshar - Jet Sliger - Gyro Attacker
Mari Sonoda - Keitaro Kikuchi - Yuka Osada - Naoya Kaido
Ryusei School
Hanagata - Rina Abe - Kyosuke Tokumoto - Shoji Inukai - Kiyotaka Nishida - Takahisa Shindo - Haruko Kamijo - Asami Ito - Ken Arai - Yuki Kawachi - Shingo Ota - Saya Kimura
Smart Brain
Wirepullers of Smart Brain
Kyoji Murakami - Smart Lady - Eiichi Toda
Orphnoch King: Arch
Lucky Clover: Saeko Kageyama - Itsuro Takuma - Kitazaki - Mr. J - Aki Sawada
Main: Goat - Wolf - Horse - Crane - Snake - Rose
Minor: Stingfish - Elephant - Ox - Mantis - Cactus - Squid - Owl - Scarab - Snail - Equisetum - Flyingfish - Armadillo - Toadstool - Scorpion - Dolphin - Worm - Seacucumber - Rabbit - Frog - Stinkbug - Swordfish - Rhinocerosbeetle - Stagbeetle - Octopus - Pigeon - Barnacle - Okra - Sloth - Frilledlizard - Crab - Bat - Coral - Butterfly - Giraffe - Longhorn - Pelican - Wild Boar - Slug - Mole - Moose - Lion - Lion (II) - Elasmotherium
Decade-exclusive: Tiger
Icon-drive.png Kamen Rider Drive
Kamen Riders
TV Series: Shinnosuke Tomari - Go Shijima - Chase - Tenjuro Banno - Kamen Rider Mach Production Model (Jun Honganji, Genpachiro Otta)
Movie/Special/Stageshow-exclusive: Zoruku Tojo - Kyoichiro Kuroi - Kamen Rider 4 - Paradox Roidmude - Heart - Brain
Transformation Devices:
Drive Driver - Mach Driver Honoh (Production Model) - Lupin Gunner - Break Gunner - Kamen Rider 3's Typhoon - Kamen Rider 4's Typhoon - Banno Driver
Transformation Gear
Shift Brace - Shift Cars - Signal Bikes - Viral Cores - Tridoron Key - Tokujo-ka Key
Handle-Ken - Door-Ju - Trailer-Hou - Zenrin Shooter - Shingou-Ax - E-Circular - Blade Gunner - Brain Megane Blade
Tire Specific Items
Justice Cage - Cure Quicker - Ladder Expander - Rumble Smasher - 10-ton Weight - Drum Shields - Frostreamer - Monster - Capture Hook - Jacky Riser - Grasper Claw
Tridoron - Ride Booster Set (Red/Blue) - Proto Tridoron - NEXTridoron - Ride Macher - Ride Chaser - Ride Crosser - TriCyclone - Sky Cyclone - Ride Braiser
Core Driviars - Heavy Acceleration Particle Measuring Device - Heavy Acceleration Reducing Machine - Anti-Roidmude Bullets - Rear Cowl Boots -
Special Investigation Unit
Kiriko Shijima - Krim Steinbelt - Jun Honganji - Genpachiro Otta - Rinna Sawagami - Kyu Saijo
Unofficial Members: Roidmude 072 - Go Shijima - Chase - Mitsuhide Nira (defected)
Other allies
Akira Hayase - Harley Hendrickson - Kyoichiro Kuroi - Eisuke Tomari - Eiji Tomari - Ninningers - Ryu Terui - Takumi Inui - Yuto Sakurai - Sakuya Tachibana - Kamen Rider Blade - Kamen Rider Chalice - Kamen Rider Leangle
Creator: Tenjuro Banno
Generals: Heart - Brain - Chase (defected) - Medic - Freeze - Krim Steinbelt (copy) - Roidmude 005 - Roidmude 006 - Tornado - Paradox
Minor Advanced Roidmudes: Reaper Legion - Iron Roidmude - Paint Roidmude - Crush Roidmude - Scooper Roidmude - Volt Roidmude - Gunman Roidmude - Voice Roidmude - Judge Roidmude - Shoot Roidmude - Shocker Buruburu - Angel Roidmude
Fusion Evolved State: Sword Roidmude - Seeker Roidmude - Open Roidmude - Cook Roidmude - Thief Roidmude
Unofficial: Mitsuhide Nira - Sigma Circular
Other villains
Zoruku Tojo - Imitation Drive - Kibaoni Army Corps - Shocker - Neo Shade - Gamma (Da Vinci Gamma)
Mu:Leader of Mu
Executive :Shocker Leader III
Kamen Riders :Kamen Rider Dark Kiva - Kamen Rider Poseidon - Kamen Rider Wiseman - Kamen Rider Duke - Kamen Rider Dark Ghost - Kamen Rider Another Para-DX
Monsters :Cancer Zodiarts - Gremlin - Demushu - Gamma Superior - Graphite