Touka Akatsuki

Touka Akatsuki (朱月籐果) is a servant of the Kureshima family. She is Kamen Rider Idunn (仮面ライダーイドゥン) and serves as a villain in the portion of Kamen Rider Zangetsu in Kamen Rider Gaim Gaiden V-Cinema and has the unique ability to control the flow of Cracks at will.

Character History
Touka Akatsuki is a young lass who was hired by Amagi Kureshima as a maid servant to the Kureshima Family. 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 time. Unknown to them, Touka eventually steals a Sengoku Driver and a Ringo Lockseed to become Kamen Rider Idunn and 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 building, Takatora realizes her treacherous acts 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 killed by Kamen Rider Duke who subsequently takes the Forbidden Ringo Lockseed.

Arms
Like with the other Armored Riders, Kamen Rider Idunn's forms are called Arms (アームズ).

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).