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Villain Overview

Ren Aoi is a mysterious man working for Badan Empire as Kamen Rider Fifteen and the secondary antagonist of Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai. He assists the Badan Empire in creating a portal to the underworld because it will bring back his deceased son, Shu Aoi.

His Fifteen driver gives him the ability to use the powers of the 15 Heisei Riders.

He was portrayed by Itsuji Itao.



Ren Aoi was once a family man when his wife was alive. After his son died in an accident, Ren falls into despair for losing him. In order to see her again, Ren joins the Underground Empire Badan, becoming their Armored Rider, in order to resurrect his son by using him to power Badan's mega-reversal machine. However, his son ran away from him, due to his father joining Badan. Once he discovered his son's whereabouts, he and the Empire go to Zawame City, the place that is also the source where the current Heisei Riders/Neo-Heisei Riders called Armored Riders created by Yggdrasill, and an alternate dimension Helheim where the Lockseeds and the Inves came from, which Badan may somehow take every one of Yggdrasill's data. Before hunting his son, he defeated and brainwashed most of the Showa Riders into believing that the Heisei Riders are nothing but nuisances and not actual heroes, as part of the plan of setting Zawame City up as a battlefield for all Riders from each era's side, with the losers being transformed into Lockseeds, then finally using his son once the Empire caught him.

ToQger vs. Gaim

Kamen Rider Fifteen first appears to fight the ToQgers, but is interfered by Showa Riders #1, #2, and V3. The three riders manage to drive off Fifteen, as he enters through a darker version of a Helheim Crack. During the post-credit scene, he foreshadows the events of Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai.

Heisei Riders vs. Showa Riders

to be added


Like his fellow Armored Riders, Kamen Rider Fifteen's forms are called Arms. But instead of normal fruit or nut Lockseeds, he uses the Heisei Rider Lockseed to channel the Legend Rider Lockseeds, allowing him to use the powers of the 15 Heisei Riders.

(guitar riff to ominous choir)
~ Transformation "announcement"

Fifteen Arms

Fifteen Arms is Fifteen's default skeleton-based form. Accessed through the Fifteen Lockseed, this form's Arms Weapon is the Bone Sword.

Similar to how Legend Rider Arms appear as the head of the represented Rider before transformation, the Fifteen Arms initally appears as a skull not unlike the original appearance of The Generalissimo of Badan.

Unlike other standard Lockseeds, there is no accompanying phrase, similar to most of the Energy Lockseeds.

(guitar riff) Decade Arms! Hakaisha on the Road!
~ Transformation announcement

Decade Arms

Decade Arms is a special form, based on Kamen Rider Decade's default form. Accessed through the Heisei Rider Lockseed channeling the Decade Lockseed, this form's Arms Weapon is the Ride Booker.

(guitar riff) Fourze Arms! Seishun Switch On!
~ Transformation announcement

Fourze Arms

Fourze Arms is a special form, based on Kamen Rider Fourze's Base States. Accessed through the Heisei Rider Lockseed channeling the Fourze Lockseed, this form's Arms Weapon is the Cosmic Module Barizun Sword instead of the Rocket Module, which was used by Kamen Rider Zangetsu in the Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle.

(guitar riff) Wizard Arms! Shabadoobie Showtime!
~ Transformation announcement

Wizard Arms

Wizard Arms is a special form, based on Kamen Rider Wizard's Flame Style. Accessed through the Heisei Rider Lockseed channeling the Wizard Lockseed, this form's Arms Weapon is the WizarSwordGun.

(guitar riff) Gaim Arms! Fruits Yoroi Musha on Parade!
~ Transformation announcement

Gaim Arms

Gaim Arms is a special form, based on Kamen Rider Gaim's Orange Arms. Accessed through the Heisei Rider Lockseed channeling the Gaim Lockseed, this form's Arms Weapon is the Daidaimaru with the Musou Saber as a side weapon.



  • Sengoku Driver - Transformation device
  • Side weapons:
    • Bone Sword - Personal weapon both untransformed and in Fifteen Arms
    • Musou Saber - Secondary side weapon in Gaim Arms
  • Arms Weapons:
    • Ride Booker - Fifteen Decade Arms' personal weapon
    • Cosmic Module Barizun Sword]- Fifteen Fourze Arms' personal weapon
    • WizarSwordGun - Fifteen Wizard Arms' personal weapon
    • Daidaimaru - Fifteen Gaim Arms' personal weapon
  • Lockseeds - Gives access to Fifteen's form changes, depending on which arm the lock is.


  • The golden symbols on his head are actually the kanji characters Fifteen, the '15' motif being a reference to the showdown between the 15 main Heisei Riders and 15 Showa Riders.
  • Fifteen's design is reminiscent of several designs seen within the franchise:
    • His skeleton motif and black/silver color scheme is reminiscent of Kamen Rider Skull.
    • Fifteen also resembles the Oni Riders from Kamen Rider Hibiki.
    • Fifteen's primary color and ribcage on the chest mirrors the iconic Shocker Combatmen design.
    • The white mane and crown on his helmet is similar to that sported by Oni Brother Mimihiko.
  • Fifteen is similar to Sou Fueki (Kamen Rider Wiseman) in that they both became evil Kamen Riders to bring a loved one back to life.
  • The casting of Itsuji Itao as Ren Aoi is coincidental considering his aforementioned role in Kamen Rider The First as a reboot version of Spider Man, the first kaijin fought in Kamen Rider. Amadum, the villain of the two-part Kamen Rider Wizard epilogue which introduced Gaim and united the 15 Heisei Riders, was portrayed by Tomorowo Taguchi who previously played a reboot version of the first kaijin fought in Kamen Rider V3, Scissors Jaguar, in Kamen Rider The Next.
  • Fifteen is the first Evil/Movie Rider to alternate between different forms, just like main Riders have done in the Heisei era.
  • In an interesting coincidence, all of the Legend Rider Arms Fifteen uses have Gaim/Kurokage-styled transformation phrases.


           Gaim logo.pngVillains

Beat Riders
Kaito Kumon | Mitsuzane Kureshima | Hideyasu Jonouchi | Ryoji Hase

Yggdrasill Corporation
Takatora Kureshima | Ryoma Sengoku | Lock Dealer Sid | Yoko Minato | Mitsuzane Kureshima | Oren Pierre Alfonzo | DJ Sagara | Kurokage Troopers

Helheim Forest
Inves: Byakko Inves | Shika Inves | Komori Inves | Inoshishi Inves | Seiryu Inves | Komori Inves (Mutant) | Kamikiri Inves | Hekija Inves | Lion Inves | Yagi Inves
Overlord Inves: Rosyuo | Redyue | Demushu | Dyudyuonshu | Grinsha | Shinmugurun | Lord Baron

Underground Empire Badan
Ren Aoi | Mogura-Roid | Combat-Roids


Bujin Gaim's Army
Kamen Rider Bujin Gaim | Pitcher Plant Monster

Megahex Collective
Megahex | Mecha-Ryoma Sengoku | Mecha-Kurokage Troopers | Mecha Inves | Lost Number Roidmudes

Grasshopper Monster | Kougane | Touka Akatsuki | Alfred | Kugai Kudo | Black Bodhi | Shura | Neo Baron | Masako Suzuka


Evil Army Shadow Line
Emperor Z | Baron Nero | Madame Noir | General Schwarz | Miss Gritta | Marchioness Morc | Count Nair | Dark Doctor Mavro | Kaniros | Grand Duke Hei | Combatant Kuros | Yami No 0gou | Kuliners

Shadow Monsters: Bag Shadow | Saber Shadow | Chain Shadow | Stove Shadow | Bucket Shadow | Seal Shadow | Bomb Shadow | Marionette Shadow | Type Shadow | Lamp Shadow | Loupe Shadow | Vacuum Shadow | Hammer Shadow | Ring Shadow | Fence Shadow | Jack-in-the-box Shadow | Soap Shadow | Hound Shadow | Pin Spot Shadow | Coin Shadow | Bottle Shadow | Wig Shadow | Table Shadow | Chair Shadow | Syringe Shadow | Billiard Shadow | Clock Shadow | Fountain Pen Shadow | Film Shadow | Tombstone Shadow | Dollhouse Shadow | Tank Top Shadow | Behemoth of Darkness
Keepers: Keeper Rook | Keeper Bishop | Keeper Knight | Castle Keeper Pawn

Underground Empire Badan
Generalissimo of Badan | Kamen Rider Fifteen | Mogura-Roid | Combat-Roids

Takatora Kureshima | Inves

           SHT Logo.pngVillains

Shocker-Zangyack Alliance
Leader: Narutaki/Doktor G
Commanders: Apollo Geist | General Shadow | General Jark | General Black | Shadow Moon | Doras | N-Daguva-Zeba | El of the Ground | Orphnoch King | Joker Undead | Nurikabe | Gryllus Worm | Bat Fangire | Alligator Imagin | Llumu Qhimil | Weather Dopant | Mezool
Kaijin: Scorpion Man | Ghoster | Isogin Jaguar | KomaThunder | Tiger-Roid | Cyborg Soldier Level 2 | Go-Gadoru-Ba | Go-Baberu-Da | Me-Garima-Ba | Go-Jaaza-Gi | Pantheras Luteus | Stellio Dextera | Brobajell | GuldMirage | Armadillo Orphnoch | Rhinoceros Beetle Orphnoch | Shell Undead | Tortoise Undead | Kasha | Musca Worm | Gecko Imagin | Bat Imagin | Mole Imagin | Medusa Legendorga | Warthog Fangire | Taurus Ballista | Cockroach Dopant | Spider Dopant | Kuwagata Yummy | Uni-Armadillo Yummy
Footsoldiers: Shocker Combatmen | Destron Combatmen | Dogma Fighters | Chaps

Leader: Rider Hunter Silva
Commanders: Black Cross King | Hades God Cyclops | Hades God Drake | Hades God Sleipnir | Hades God Dagon | Yaiba of Darkness | Gai | Rei | Sea Fist Demon Rageku | Sanyo | Suugu | Long | Miranda | Rairaiken | Yogoshimacritein | Pollution President Batcheed | Doukoku Chimatsuri | Dereputa of the Meteor | Mons Drake of the Planet | Brajira of the Messiah | Deratsueigar | Zatsurig | Warz Gill | Ackdos Gill
Monsters: Shikabanen | Zodomas | Buramudo | Nanonanoda | Bowser | Yokubarido | Stargull | Almadon | Uorlian | Daiyarl | Shieldon | Vannain | Namono-Gatari of the Ortaurus Headder | Bari-Boru-Dara of the Uniberus Headder | Rō-O-Zā-Ri of the Hydrapan Headder | Chinomanako | Nunchuck Banki
Footsoldiers: Gormin | Sugormin | Dogormin

Space Crime Syndicate Madou
Space Shocker
Leader: Shadow Moon
Commanders: Space Ikadevil | Space Spider Man
Kaijin: Scorpion Man | Saboteguron | Ghoster | Zanjioh | Jaguarman | Girizames | Schwarian | Zu-Zain-Da | Sonorabuma | Buzzstinger Wasp | Arch Orphnoch | Tortoise Undead | Gecko Imagin | Pearlshell Fangire (Blue) | Bat Fangire | Beetle Fangire | Bat Dopant | Beast Dopant | Pteranodon Yummy | Kamakiri Yummy | Ika-Jaguar Yummy | Musca Zodiarts | Scorpion Zodiarts | Sagittarius Zodiarts | Skydain | Groundain
Footsoldiers: Shocker Combatmen | Chaps

Army of Resurrected
Leader: Demon King Psycho
Commanders: Space Reider
Rhino Doubler | Lizard Doubler | Zan Vardo | Karateloid | Bulldozerloid | Parabolaloid 2 | Chief of Staff Damaras | Development Technical Officer Insarn | Dyrandoh | Stargull | Sneak Brothers | Dogormin | Doukoku Chimatsuri | Dayu Usukawa | Chinomanako | Nunchuck Banki | Long | Sanyo | Suugu | Sea Fist Demon Rageku | Furious Demon God Gai | Grand Beast Rei | Agent Abrella

Badan Empire
Leader: Generalissimo of Badan
Commanders: Ambassador Darkness | Kamen Rider Fifteen | Llumu Qhimil | General Shadow | High Priest Baraom | General Jark
Kaijin: Scorpion Man | Saboteguron | Ghoster | Zanjioh | Shiomaneking | Poison Lizard Man | Jaguarman | Girizames | Hiruchameleon | Ganikomol | Turtle Bazooka | Marshal Machine | Sword Master Birugenia | Schwarian | Doras | Garai | Suddendas | Bird Dopant | Kamakiri Yummy | Ika-Jaguar Yummy | Shocker Greeed | Chameleon Zodiarts | Libra Zodiarts | Arachne
Footsoldiers: Shocker Combatmen | Destron Combatmen | Combat-Roids | Chaps
Allies: General Schwarz

2015 Shocker
Leader: Great Leader of Shocker
Commanders: General Black | General Shadow | Marshal Machine | High Priest Darom | General Jark | Super Galaxy King | Schwarian | N-Gamio-Zeda | Lobster Orphnoch | Weather Dopant | Sagittarius Nova | Phoenix | Demushu | Roidmude 089 | Kamen Rider 3
Kaijin: Garagaranda | Cheetahkatatsumeri | Zanjioh | Shiomaneking | Poison Lizard Man | Poison Lizard Man | Girizames | Turtle Bazooka | Roidmude 057 | Roidmude 016 | Roidmude 076
Footsoldiers: Shocker Combatmen

Game World
Eight Kirino | Another Hiiro | Kamen Rider Dark Kabuto | Kamen Rider Dark Drive | Kamen Rider Dark Ghost | Kamen Rider Genm Zombie Gamer

Shocker (Game World)
Leader: Shocker Leader III
Commanders: Ambassador Hell | Space Ikadevil | Redyue | Paradox Roidmude | Bat Amazon | Black Cross King | Raimein | Emperor Z | Gengetsu Kibaoni | Ginis
Footsoldiers: Shocker Combatmen | Buglars | Zorima | Combatant Kuros | Moeba