Touka Akatsuki

Touka Akatsuki (朱月 籐果) is 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) using the Ringo Lockseed.

Character History
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 turning her into a guinea pig. However, she never realize about her time with Takatora and Mitsuzane, of 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.

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 a past, other than just a slave. While retreating back where her identity was discovered by Takatora, she doesn't understand, even he's a Kurehsima, why did he spare her. In a 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 reveal to her also a slave within the Nursery, and killed her, then subsequently takes the Forbidden Ringo Lockseed from her dead body.

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 done it as means of attacking her targets.

Arms
Like with the other Armored Riders, Kamen Rider Idunn's forms are called Arms (アームズ). Her Sengoku Driver plays European trumpet music and announces "Come On" (カモン) 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), Au Lait (オーレ), or Sparking (スパーキング).

Devices

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

Weapons

 * Arms Weapons - Weapons that come with the Arms:
 * Sword Bringer - One of Idunn Ringo Arms' personal weapons
 * Apple Reflecter - One of Idunn Ringo Arms' personal weapons

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

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

Legend Rider Lockseeds

 * The following Legend Rider Lockseeds are styled for Idunn, as well as Baron, Gridon, and Duke:
 * Black RX - "Son of the Sun!"
 * Shadow Moon - "King of Century!"
 * Blade - "Sword of Spa~de!"
 * Kiva - "King of the Vamp~ire!"
 * OOO - "Tatoba, Ta~To~Ba!"
 * OOO Tajadol Combo - "Ta~Ja, Ta~Ja~Dol!"
 * OOO Putotyra Combo - "Pu-To-Tyranno~Sau~rus!"
 * Ankh - "Happy Birth~day!"
 * Baron - "Knight of Ba~nana!"