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Icon-gaim.png This article is about a rider in Kamen Rider Gaim.

"The Kamen Rider who holds the power of 15, Fifteen."
―Ren introduces himself to Gaim.[src]

Ren Aoi (葵 連, Aoi Ren) is a mysterious man, who transforms into Kamen Rider Fifteen (仮面ライダーフィフティーン, Kamen Raidā Fifutīn), created by the Badan Empire in order to defeat the Kamen Riders. He is the father of Shu Aoi and husband of Saki Aoi.



Ren Aoi is a family man when his son was alive. After his son died in an accident while having to do with meeting his wife at a lighthouse, Ren falls into despair after losing his son. When his son is in fact alive, Ren joins the Underground Empire Badan, becoming their Kamen Rider to find his still alive son, but somehow got brainwashed into their pawn.

ToQger vs. Gaim

"Soon the moment the world is overthrown will arrive. And that will be when my ambition is fulfilled!"
―Fifteen makes his vow on the eve of war[src]

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-credits scene, he foreshadows the events of Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai.

Heisei Rider vs. Showa Rider: Kamen Rider Taisen

Ren Aoi redeemed.

After finding his son at Zawame City, Ren appeared in his normal identity, battling Gaim, Baron, Ryugen and Zangetsu Shin, and transforming into Fifteen. He is able to defeat Zangetsu Shin then later Ryugen, thanks to the Heisei Rider Lockseed he uses as Wizard Arms. His battle with Gaim is interrupted by three Showa Riders, leading Gaim to escape with Shu and Mai to safety. He found his son again in his home destroying the message that Shu made for his mother and tells him to come in order to use Shu's power for the Mega Reversal Machine. However, his son refused because Ren began to act strangely due to him being brainwashed, thus leading to Ren forcing his hand to take him away from the Heisei Riders' protection. Upon his son finally being caught near the lighthouse where his wife, Saki is, Fifteen managed to take his son away from the Heisei Riders and meet his wife. He is defeated by Kamen Rider Gaim 1go Arms after he was overpowered by his 1 Squash, destroying his Sengoku Driver and its Yomimaru, thus freeing him from Badan's grasp. After realizing what he did when he was brainwashed by Badan, his son began fading away, but managed to take his son to the lighthouse to reunite with his wife, thanks to the Riders (mostly Showa Riders' Rider Syndrome teleportation) and seeing their son disappear to the top of sky as a light above them.


Like his fellow Armored Riders, Kamen Rider Fifteen's forms are called Arms (アームズ, Āmuzu). His Sengoku Driver plays American rock & roll music and emits a guitar riff sound before every transformation. But instead of normal fruit or nut Lockseeds, Fifteen uses the Heisei Rider Lockseed to channel the Legend Rider Lockseeds, allowing him to use the powers of the 15 Heisei Riders.

By pressing the Sengoku Driver's Cutting Blade down on the Lockseed after transforming from one to three times, Fifteen can activate one of three finishing moves based on his current Arms form: Squash (スカッシュ, Sukasshu), Au Lait (オーレ, Ōre), or Sparking (スパーキング, Supākingu).

Ride Wear

The Ride Wear (ライドウェア, Raido Uēa) is Fifteen's undersuit. This form is completely vulnerable to any incoming attacks when shot at directly in the suit rather than at the Arms that is descending down on the Rider. Uniquely, Fifteen's Ride Wear is not seen during his transformation into his default form and only appears when he changes arms.

The Ride Wear that Fifteen's Sengoku Driver has is easily identifiable through its Rider Indicator (ライダーインジケーター, Raidā Injikētā) faceplate. The Rider Indicator only identifies what Ride Wear a Sengoku Driver contains for simplicity and can be replaced with extensions such as the Genesis Core or Senyo Joint.

Fifteen Arms

Fifteen Arms

"(Guitar riff) (Bone crackle to ominous choir)"
―Transformation announcement[src]

Fifteen Arms (フィフティーンアームズ, Fifutīn Āmuzu) is Fifteen's default form that is accessed through the Fifteen Lockseed.

While assuming Fifteen Arms, Fifteen dons the Fifteen Armor Part (フィフティーンアーマーパート, Fifutīn Āmā Pāto) and his Arms Weapon is the Yomimaru. Similar to how Legend Rider Armor Parts appear as the head of the represented Rider before transformation, the Fifteen Armor Part initally appears as a skull not unlike the original appearance of the Generalissimo of Badan.

Interestingly, when Fifteen transforms into this form, he bypasses the Ride Wear stage entirely as the armor and his suit form at once.

Appearances: ToQger Vs. Gaim, Kamen Rider Taisen

The Rider Arms (ライダーアームズ, Raidā Āmuzu) are forms based on past Kamen Riders. All of these forms are exclusive to Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai.

Wizard Arms

Wizard Arms

"(Guitar riff) Wizard Arms! Shabadoobi showtime!"
―Transformation announcement[src]

Wizard Arms (ウィザードアームズ, Uizādo Āmuzu) is a Legend Rider Arms based on Kamen Rider Wizard's Flame Style that is accessed through the Heisei Rider Lockseed channeling the Wizard Lockseed.

While assuming Wizard Arms, Fifteen dons the Wizard Armor Part (ウィザードアーマーパート, Uizādo Āmā Pāto) and his Arms Weapon is the WizarSwordGun.

This form is exclusive to Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai.

Decade Arms

Decade Arms

"(Guitar riff) Decade Arms! Hakaisha on the road!"
―Transformation announcement[src]

Decade Arms (ディケイドアームズ, Dikeido Āmuzu) is a Legend Rider Arms based on Kamen Rider Decade's default form that is accessed through the Heisei Rider Lockseed channeling the Decade Lockseed.

While assuming Decade Arms, Fifteen dons the Decade Armor Part (ディケイドアーマーパート, Dikeido Āmā Pāto) and his Arms Weapon is the Ride Booker.

Similar to Decade himself, this form allows Fifteen to use the power of the first Nine Heisei Riders as seen when he activates his Sengoku Driver's (Hibiki) Squash function, manifesting an Ongekibou Rekka to counter the one used by Decade as Kamen Ride: Hibiki. Decade Arms' ability to use the power of the previous Heisei Riders without changing Arms is not unlike Decade's own Violent Emotion form or Gaim's Kiwami Arms.

Another ability of Decade Arms is allowing Fifteen to channel the power of Decade's Attack Ride cards, as seen when he activates a Decade Squash attack while fighting Kamen Riders Decade, Double, Fourze, and Wizard. Charged into the Ride Booker, he unleashed a series of slashes against his opponents amplified by self-replication (Attack Ride: Illusion) and multiple slash (Attack Ride: Slash) abilities.

This form is exclusive to Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai.

Fourze Arms

Fourze Arms

"(Guitar riff) Fourze Arms! Seishun switch on!"
―Transformation announcement[src]

Fourze Arms (フォーゼアームズ, Fōze Āmuzu) is a Legend Rider Arms based on Kamen Rider Fourze's Basestates that is accessed through the Heisei Rider Lockseed channeling the Fourze Lockseed.

While assuming Fourze Arms, Fifteen dons the Fourze Armor Part (フォーゼアーマーパート, Fōze Āmā Pāto) and his Arms Weapon is a rotation between the Barizun Sword (primary) and Billy the Rod (Fourze Au Lait) instead of the Rocket Module used by Kamen Rider Zangetsu in the previous movie.

This form is exclusive to Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai.

Gaim Arms

Gaim Arms

"(Guitar riff) Gaim Arms! Fruits yoroi musha on parade!"
―Transformation announcement[src]

Gaim Arms (鎧武アームズ, Gaimu Āmuzu) is a Legend Rider Arms based on Kamen Rider Gaim's Orange Arms that is accessed through the Heisei Rider Lockseed channeling the Gaim Lockseed. This form is referred to by Fifteen as his "ultimate transformation", and it is powerful enough that it was able to defeat Gaim in Kachidoki Arms.

While assuming Gaim Arms, Fifteen dons the Gaim Armor Part (鎧武アーマーパート, Gaimu Āmā Pāto) and his Arms Weapon is the Daidaimaru. He can also use the Musou Saber as an alternative side weapon to his own Yomimaru.

This Arms' finisher has two variations depending on which function Fifteen activates with his Sengoku Driver.

  • Au Lait: Channeled into the Daidaimaru, Fifteen unleashed a dark version of the Daidai Ittou (大橙一刀, Daidai Ittō, lit. "Great Orange Sword Strike") against Gaim Kachidoki Arms' Hinawa Daidai Musou Zan. This attack prevailed and successfully knocked Gaim out of his transformation.
  • Sparking: Activated on his Sengoku Driver in response to Gaim 1go Arms' 1 Squash Rider Kick, Fifteen raised his Daidaimaru and Yomimaru to unsuccessfully block the attack, which defeated him and resulted in the destruction of his Sengoku Driver.



  • Sengoku Driver - Transformation device
  • Lockseeds - Gives access to Fifteen's Arms changes, depending on which lock is used


Behind the scenes


Ren Aoi was portrayed by Itsuji Itao (板尾 創路, Itao Itsuji), who previously portrayed Spider in Kamen Rider The First.

His suit actor is Kenji Tominaga (富永 研司, Tominaga Kenji), who was previously the suit actor for the Kamen Rider Bujin Gaim and Ogre Phantom in the previous movie. Tominaga also served as suit actor for Kamen Rider Duke in the Kamen Rider Gaim series.


  • The golden symbols on Kamen Rider Fifteen's head are actually the kanji characters 十五 (, Jūgo), which means Fifteen, the '15' motif being a reference to the showdown between the 15 main Heisei Riders and 15 Showa Riders.
    • He's a death-themed Rider, and when 15 is dislocated, it forms in Roman numerals "IV", the number 4. In Japanese, 4 and "death" are pronounced the same (Shi). (There is a famous superstitional belief around the number 4 in Japan).
  • 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 Masquerade Dopant's homage to the iconic Shocker Combatman design.
    • The white mane and crown on his helmet is similar to that sported by Oni Brother Mimihiko.
  • The casting of Itsuji Itao as Ren Aoi is coincidental considering his aforementioned role in Kamen Rider The First as a reboot version of Man Spider, 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, similar to how most of the primary Kamen Riders in the Heisei era have done so.
  • In an interesting coincidence, all of the Legend Rider Arms Fifteen uses have Gaim/Kurokage/Bujin Gaim/Kamuro-styled transformation phrases from a post-Kiva Rider series.
  • Fifteen's Arms Weapons are meant to be sword-based, hence why he uses the Billy the Rod and Barizun Sword in Fourze Arms instead of the Rocket Module.
  • He's the first Armored Rider to have a name that is the same as his Arms' name.
  • He is the first Evil (and former) Rider who is not killed afterward.

Ren Aoi's destroyed Sengoku Driver.

  • When Ren's Sengoku Driver is destroyed, the Rider Indicator didn't become blank and his Fifteen Lockseed didn't get destroyed.
  • Though Fifteen Gaim Arms is shown to wield the Musou Saber, it is only seen in promotional images and does not appear in the released version of the Kamen Rider Taisen movie. However, in his final battle against Gaim, Fifteen is shown to use his personal Yomimaru sword alongside the Daidaimaru in the same fashion as the Musou Saber.
  • Ren's style of transforming into Fifteen is similar to that of Jun Kazu's transformation into the Utopia Dopant, as his item is drawn into his Driver seemingly by itself after he presses it as opposed to him physically inserting it into the Driver. Incidentally, the Lockseeds and Gaia Memories share a similarity in that their respective sounds are programmed into the individual items themselves as opposed to the Driver. Masamune Dan also uses that same style of transforming into Kamen Rider Cronus later on.
  • Along with Bujin Gaim and Mars/Jam, Ren resembles that of the Four Horsemen of the Apocalypse in Revelations Chapter 6:1-8 in the Bible. As Fifteen, Ren represents "Death" due to the skeletal motif of his suit and Badan's end-goal to flip the lands of the dead and the living in the movie.



External Links


Icon-gaim.png Kamen Rider Gaim
Armored Riders
TV Series: Kouta Kazuraba - Kaito Kumon - Mitsuzane Kureshima - Takatora Kureshima - Hideyasu Jonouchi - Ryoji Hase - Oren Pierre Alfonzo - Zack - Unnamed girl - Kurokage Troopers
Movie/Special-exclusive: Bujin Gaim - Ren Aoi - Lapis - Kohgane - Touka Akatsuki - Shura - Kugai Kudo - Masako Suzuka
Stageshow-exclusive: Maja - Masahito Shizumiya - Aym - Glasya - Kagemasa Shizumiya - Yukimura Belial Grunstein
Genesis Armored Riders
TV Series: Takatora Kureshima - Ryoma Sengoku - Yoko Minato - Lock Dealer Sid - Kaito Kumon - Mitsuzane Kureshima
Movie-exclusive: Peko - Alfred
Bujin Riders
Bujin Gaim - Bujin Wizard - Bujin Fourze - Bujin OOO - Bujin Double - Bujin Decade - Bujin Kiva - Bujin Den-O - Bujin Kabuto - Bujin Hibiki - Bujin Blade - Bujin Faiz - Bujin Ryuki - Bujin Agito - Bujin Kuuga
Rider Gear
Sengoku Driver - Genesis Driver - Lockseeds - Lockseed Holder - Musou Saber Holster - Armor Parts
Arms Weapons: Daidaimaru (Blood/Dark/Kabi) - Musou Saber - Pine Iron - Ichigo Kunai - Suika Sojinto/Suika Arms Lance/Suika Arms Gloves - Bana Spear - Donkachi (Shine) - Duri Noko (Giga) - Mango Punisher - Budou Ryuhou - Kiwi Gekirin - Melon Defender - Kagematsu (Shin) - Kurumi Bombers - Lemon Rapier - Sonic Arrow (Saver) -Kachidoki Bata - Hinawadaidai-DJ-Ju/Hinawatenga-DJ-Ju - Shine Lychee Sword - Marron Bombers - Watermelon Gatling - Sword Bringer - Apple Reflecter - Yomimaru - Souginjou - Hells Cane
Over Lord Weapons: Sheimu - Dau - Dengoshuimu - Aashuimu - Joeshuimu - Dimubu - Guronbaryamu - Tyrant Blade
Rider Machines
Sakura Hurricane - Rose Attacker - Dandeliner - Tulip Hopper
TV Series: Mai Takatsukasa - Yuya Sumii - Akira Kazuraba - Chucky - Rica - Rat - Peko - Kiyojiro Bando - Iyo - Kikaider (REBOOT)
Movie-exclusive: Ieyasu - Nobunaga - Ranmaru - Shu Aoi - Saki Aoi - Shapool - Azami
Stageshow-exclusive: Paimon - Gusion - Berith - Ose - Kagiomi Shizumiya
Beat Rider Teams: Team Gaim - Team Baron - Team Raid Wild - Team Invitto - Team Red Hot - Team Soten - Team Pop Up - Team Spingere - Team Boost - Team Mouryou - Team Severe Beat - Team Orange Ride - Team Baroque Red - Team Green Dolls
Kamen Riders: Takeshi Hongo - Keisuke Jin - Ryo Murasame - Takumi Inui - Momotaros - Tsukasa Kadoya - Shotaro Hidari - Haruto Soma
Other Heroes: Daigo KiryuIcon-crosswiki.png - Ressha Sentai ToQgerIcon-crosswiki.png - Jiro
Locations: Zawame - Charmant - Yggdrasill Tower
Yggdrasill Corporation
Takatora Kureshima - Mitsuzane Kureshima - Ryoma Sengoku - Lock Dealer Sid - Yoko Minato - DJ Sagara - Amagi Kureshima
Remnant groups: Black Bodhi - Neo Baron
Zawame City Restoration Bureau
Femushinmu (Over Lord Inves): Rosyuo - Demushu - Redyue - Dyudyuonshu - Grinsha - Shinmugurun - Over Lord Queen
Lapis - Kougane
Other Over Lords: Lord Baron - Tyrant
Advanced Inves: Byakko Inves - Seiryu Inves - Hekija Inves - Shika Inves - Kamikiri Inves - Komori Inves (Mutant) - Inoshishi Inves - Lion Inves - Yagi Inves
Elementary Inves
Helheim (Forest) - Forbidden Fruit - Man of the Beginning - Woman of the Beginning - Femushinmu Planet - Planet of Helheim
Other Villains
Grasshopper Monster - Badan Empire - Utsubokazura Kaijin - Megahex - Hakaider (REBOOT)