This article is about a/an rider in Kamen Rider Gaim.
RenAoi profile
Kamen Rider Fifteen
Ren Aoi
Gender: Male
Series: Kamen Rider Gaim
Motif: 15, Skeleton
Rider Type: Villain (former)
Hero (current, no longer a rider)
Homeworld: Earth (Main Timeline Continuity)
First Appearance: Ressha Sentai ToQger Vs. Kamen Rider Gaim Spring Vacation Combining Special
Last Appearance: Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai
Number of Episode
1 (movie)
1 (TV special)
Actor: Itsuji Itao
Kamen Rider Fifteen
Fifteen Profile
"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 Shuu Aoi and husband of Saki Aoi.

Character HistoryEdit


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. GaimEdit

"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 TaisenEdit

After finding his son at Zawame City, Ren appeared in his normal identity, battling Gaim, Baron, Ryugen and Zangetsu Shin, transforming into Fifteen, able to defeat Zangetsu Shin then later Ryugen, thanks to Heisei Rider Lockseed he use as Wizard Arms. His battle with Gaim is interrupted by three very first 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 Reverse Project. 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 Heisei Riders' protection. Upon his son finally caught nearby 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 1 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 for 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?).



This form is briefly seen during Ren's transformation sequence, before the armor attaches. However, 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.

Notably, this is not a step in his transformation to his regular form.

Fifteen Arms
HD KR Fifteen 2

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 skeleton-based form. Accessed through the Fifteen Lockseed, this form's Arms Weapon is the Yomimaru. This form debuts in the ToQger Vs. Gaim special.

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.

Unlike other standard Lockseeds, the Fifteen Lockseed has no accompanying phrase, similar to most of the Energy Lockseeds, though it also lacks the call of "Fifteen Arms", instead just having the music.

Interestingly, when he transforms into this form, he bypasses the "Pre-Arms" stage entirely as the armor and his suit form at once.

Appearances: ToQger Vs. Gaim, Kamen Rider Taisen

All of these forms are 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. Accessed through the Heisei Rider Lockseed channeling the Decade Lockseed, this form's 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.

Decade Arms also allows Fifteen to channel the power of Decade's Attack Ride cards, as seen when he activates a Decade Squash attack while fighting against 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 super speed (Attack Ride: Clock Up).

Fourze Arms
15 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 Base States. Accessed through the Heisei Rider Lockseed channeling the Fourze Lockseed, this form's Arms Weapon is a rotation between the Cosmic Module Barizun Sword (main Arms Weapon) and Elek Module Billy the Rod (which appeared as part of the Fourze Au Lait) instead of the Rocket Module, which was used by Kamen Rider Zangetsu in the previous movie.

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. Accessed through the Heisei Rider Lockseed channeling the Wizard Lockseed, this form's Arms Weapon is the WizarSwordGun.

Gaim Arms
15 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, refered to by Fifteen himself as his 'ultimate transformation'. Accessed through the Heisei Rider Lockseed channeling the Gaim Lockseed, this form's Arms Weapon is the Daidaimaru. This form is able to defeat Gaim in Kachidoki Arms.



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


Behind the scenesEdit


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 is 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 Kamen Rider Gaim series.


  • The golden symbols on his 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.
  • Fifteen's design is reminiscent of several designs seen within the franchise:
  • 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, 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 Elek Module Billy the Rod and Cosmic Module 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 only Evil Rider (and former) who is not killed afterward (even some riders who turned good die in the end).
  • When Ren's Sengoku Driver is destroyed, the Rider Indicator didn't become blank and his Fifteen Lockseed didn't get destroyed.
  • Along with Bujin Gaim, Mars, and Jam, Fifteen resembles one of the Four Horsemen of the Apocalypse from the bible that is described in the last book of the New Testament of the Bible called the Book of Revelation of Jesus Christ to Saint John the Evangelist at 6:1-8. In this case, Kamen Rider Fifteen represents "Death" because of the suit's design including his Sengoku Driver and Fifteen Lockseed being created by the Underground Empire Badan, as well as following the Empire's plan on creating a world of death, such as reviving the dead like the main user of Kamen Rider Kaixa, Masato Kusaka, and his son Shu.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.