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

Touka Akatsuki (朱月 籐果 Akatsuki Tōka) was a servant of the Kureshima family and a childhood friend of Takatora Kureshima. Because of her past, she has the unique ability to control the flow of Cracks at will. In an act of revenge, she gains a Sengoku Driver and is able to become Kamen Rider Idunn (仮面ライダーイドゥン Kamen Raidā Idun) using the Ringo Lockseed.

Character History

Touka as a maid.

Touka was among the list of children in Zawame Children's Nursery where they were part of a lethal experiment led by Amagi Kureshima that allowed them to control Helheim at will. In her teenage years, she was hired by the Kureshimas as a maid servant. She became close friends with Takatora during her time as a maid/servant, which she baked an apple pie for her close friend. Years later, Touka reunites with Takatora and she spends her time with the Kureshima brothers for a short while, however, she tells the Kureshima brothers that their father had passed away. Unknown to them, she gained a Sengoku Driver and a Ringo Lockseed to become Kamen Rider Idunn. She reveals that she is the one responsible for the murder of Amagi Kureshima and later she would attempt to murder the Kureshima brothers and destroy Yggdrasill facilities along with it, as an act of revenge for turning her into a guinea pig. However, she never realized about her time with Takatora and Mitsuzane, of them treating her kindly as a human being, and seeing her like a sister to them.

As Idunn, she is responsible for the attacks on the Kurokage Troopers, Sid and almost attacked Yoko. She uses the ability to control the flow of the Cracks due to the Ringo Lockseed's effect.

When she's about to attack Mitsuzane, Takatora shows up as he tries to transform into Zangetsu-Shin, but she quickly steals the Melon Energy Lockseed and runs away.

Touka's end.jpg

After Takatora unmasks her in an abandoned child care facility, Takatora realizes the truth about his father's past and Touka's treachery as she transforms into Idunn to clash against Takatora, who transforms into Zangetsu Watermelon Arms. After she's being shot, Takatora regains his Melon Energy Lockseed to transform into Zangetsu-Shin so that he can defeat her.

After she is weakened by Takatora, she is somehow spared by Takatora, due to treating her like a human and family in the past, other than just a slave. While retreating back to where her identity was discovered by Takatora, she doesn't understand, even he's a Kureshima, why he spared her. At same time when she was about to be turned into an Inves, due to the Ringo Lockseed's effect, she is confronted by Kamen Rider Duke who revealed to her that he was also a slave within the Nursery, and killed her, then subsequently takes the Forbidden Ringo Lockseed from her dead body.

Video Game appearances

Kamen Rider Buttobasoul

Kamen Rider Idunn Medal

Kamen Rider Idunn is a playable character in Kamen Rider Buttobasoul.

Powers and Abilities

While temporarily in the possession of Forbidden Ringo Lockseed, Touka had these following abilities, following her mutation into Inves. Among them are:

Crack Creating
Touka can create Cracks freely as means of transportation or sneak attacks. The location of the Crack she creates sometime emits Helheim floras.
Helheim Plant Manipulation
Touka can manipulate Helheim plant vines freely but never used it as means of attacking her targets.


Like with the other Armored Riders, Kamen Rider Idunn's forms are called Arms (アームズ Āmuzu). Her Sengoku Driver plays European trumpet music and announces "Come On" (カモン Kamon) before every transformation, while her personal Lockseeds are styled in pure English that is sung in a chorus-like manner.

By pressing the Sengoku Driver's Cutting Blade down on the Lockseed after transforming from one to three times, Idunn can activate one of three finishing moves based on her 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 Idunn's default form undersuit which is briefly seen during Idunn's transformation sequence, before the Armor Part attaches or when she changes Arms. 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.

The Ride Wear that Idunn's Sengoku Driver has is easily identifiable through the Rider Indicator. The Rider Indicator only identifies what Ride Wear a Sengoku Driver contains for simplicity and can be replaced with extensions.

Ringo Arms

Ringo Arms

"Come on! Ringo Arms! Desire forbidden fruits!"
―Transformation announcement[src]

Ringo Arms (リンゴアームズ Ringo Āmuzu, lit. "Apple Arms") is Idunn's apple-based default form that is accessed through the Forbidden Ringo Lockseed[1].

While assuming Ringo Arms, Idunn dons the Ringo Armor Part (リンゴアーマーパート Āmā Pāto, lit. "Apple Armor Part") and her Arms Weapons are the Sword Bringer and Apple Reflecter.

As Idunn, Touka was able to fight off against the Kurokage Troopers and even had the advantage against Zangetsu Watermelon Arms. However, this form is still inferior to that of a New Generation Rider and Touka was quickly defeated by Zangetsu Shin.

After Touka's death at the hands of Ryoma Sengoku, the Forbidden Ringo Lockseed was given to Kaito Kumon who promptly destroyed it after his battle against the Tyrant Over Lord.

This form's finisher is an unnamed Rider Slash: Idunn activates the Squash function on her Sengoku Driver and unleashes a powerful slash with the Sword Bringer.

This form is exclusive to Gaim Gaiden: Kamen Rider Zangetsu



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


Behind the Scenes


Touka Akatsuki is portrayed by Sayuri Iwata (岩田 さゆり Iwata Sayuri). As a teen, she is portrayed by Ai Uchida (内田 愛 Uchida Ai).

As Kamen Rider Idunn, her suit actor is Satoshi Fujita (藤田 慧 Fujita Satoshi)


Kamen Rider Idunn concept art


  • Idunn's name is from the Nordic goddess Iðunn, who has been associated with apples.
    • Additionally, Idunn is pronounced similarly to "eden."
  • Idunn is the fourth Rider to utilize an apple-type Lockseed, after Mars, Kamuro and Jam.
    • Chronologically, Idunn is the first apple-based Rider.
  • Idunn's suit is mostly a retool of Jam's, who is in turn a retool of Kamuro's suit.
  • Chronologically, Touka Akatsuki (Idunn) is the first female Armored Rider, followed by Yoko Minato (Marika), who is the first female New Generation Rider, and Kohgane (Jam), who can actually take on any gender or form.

Legend Rider Lockseeds



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 - Kurokage Troopers
Movie/Special/Stageshow-exclusive: Bujin Gaim - Ren Aoi - Lapis - Kougane - Touka Akatsuki - Shura - Kugai Kudo - Maja - Masako Suzuka
New Generation Riders
TV Series: Takatora Kureshima - Ryoma Sengoku - Yoko Minato - Lock Dealer Sid - Kaito Kumon - Mitsuzane Kureshima
Movie-exclusive: Peko - Alfred
Rider Gear
Sengoku Driver - Genesis Driver - Lockseeds - Armor Parts - Arms Weapons - Musou Saber - Sonic Arrow
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 - Shu Aoi - Saki Aoi - Shapool - Azami
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
Kamen Riders: Takeshi Hongo - Keisuke Jin - Ryo Murasame - Takumi Inui - Momotaros - Tsukasa Kadoya - Shotaro Hidari - Haruto Soma - Shinnosuke Tomari - Takeru Tenkuji - Emu Hojo - Parado - Sento Kiryu - Sougo Tokiwa
Other Heroes: Daigo KiryuIcon-crosswiki.png - Ressha Sentai ToQgerIcon-crosswiki.png - Kikaider (REBOOT)

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 - Pitcher Plant Monster - Megahex - Hakaider (REBOOT)
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