The Secret of Helheim's Fruits

The Secret of Helheim's Fruits (ヘルヘイムの果実の秘密) is the fourteenth episode of Kamen Rider Gaim. It is the debut of Kamen Rider Duke, Kamen Rider Sigurd, and Kamen Rider Marika.

Synopsis
After Hase transforms into an Inves, Gaim tries to take him out before he can do much damage, but finds it difficult to harm someone who he believes is still human inside. Meanwhile, Baron does his best to combat Zangetsu Shin, but is overcome by Kurokage Troopers and captured. And Mitsuzane, who realizes his brother is their foe the white Armored Rider, inflitrates the Yggdrasill Corporation headquarters on his own to see what is truly going on.

Plot
Hase flees after transforming into the Hekija Inves and Gaim pursues him while Baron confronts Zangetsu Shin by himself. Refraining from killing a human, Kota corners Hase who barely returns to human form, although still under the fruit's effects and attacks Kota before escaping. Meanwhile, Zangetsu Shin defeats Baron and Kaito is captured by the Yggdrasill Corporation's Kurokage Troopers. Kota returns to Team Gaim's base and when Mai and the others ask him about what is happening, he claims that he cannot explain the situation at the moment and leaves to keep searching for Hase. The next day, Takatora returns home briefly and Mitch hides himself inside his car to infiltrate the Yggdrasill Corporation's facility. Hase appears at Drupers, and after trying to eat the fruits there, he attacks Rica, but Rat gets hurt trying to protect her, and after Hase flees, he is taken to the hospital. Elsewhere, Mitsuzane witness a meeting between Sid and Takatora who discuss the mass production of the Genesis Drivers before they are informed of Hase's location and leave in a hurry. When Mitsuzane enters the room and searches the research files, he watches a video of Ryoma explaining how any organism that eats a Helheim Forest fruit has its DNA rewritten and is transformed into an Inves. In another video, Mitsuzane discovers, much to his horror, that Yuya Sumii ate a fruit and transformed into the Byakko Inves that Gaim destroyed months ago. Meanwhile, Gaim tries to calm down Hase with no success until Zangetsu Shin appears, accompanied by three other New Generation Riders using Genesis Drivers. One of the other Riders, New Generation Rider Sigurd, drives Gaim away from the Hekija Inves before destroying the Inves and reveals himself as Sid. Kota confronts Sid for killing a human being just before he is restrained and captured by Kurokage Troopers.

Cast

 * Kota Kazuraba (葛葉 紘汰): Gaku Sano (佐野 岳)
 * Kaito Kumon (駆紋 戒斗): Yutaka Kobayashi (小林 豊)
 * Mitsuzane Kureshima (呉島 光実): Mahiro Takasugi (高杉 真宙)
 * Mai Takatsukasa (高司 舞): Yuumi Shida (志田 友美)
 * Chucky (チャッキー): KANON
 * Rica (リカ): MIINA
 * Rat (ラット): Ren Ozawa (小澤 廉)
 * Takatora Kureshima (呉島 貴虎): Yuki Kubota (久保田 悠来)
 * Ryoji Hase (初瀬 亮二): Atsushi Shiramata (白又 敦)
 * Ryoma Sengoku (戦極凌馬): Tsunenori Aoki (青木玄徳)
 * Kiyojiro Bando (阪東 清治郎): Tomohisa Yuge (弓削 智久)
 * Lock Dealer Sid (錠前ディーラー　シド): Kazuki Namioka (波岡 一喜)
 * Genesis Driver Equipment Voice (ゲネシスドライバー各種アイテム音声): Shin-ichiro Miki (三木 眞一郎)
 * Sengoku Driver Voice (戦極ドライバー音声), Lockseed Voice (ロックシード音声): Seiji Hiratoko (平床 政治)
 * Narration (ナレーション): Hōchū Ōtsuka (大塚 芳忠)

Lockseeds

 * Lock Used:
 * Gaim:
 * Orange
 * Baron:
 * Banana
 * Zangetsu Shin:
 * Melon Energy
 * Duke:
 * Lemon Energy
 * Sigurd:
 * Cherry Energy
 * Marika:
 * Peach Energy
 * Kurokage Troopers:
 * Matsubokkuri
 * Arms Change:
 * Gaim:
 * Orange Arms
 * Baron:
 * Banana Arms
 * Zangetsu Shin:
 * Melon Energy Arms
 * Duke:
 * Lemon Energy Arms
 * Sigurd:
 * Cherry Energy Arms
 * Marika:
 * Peach Energy Arms
 * Kurokage Troopers:
 * Matsubokkuri Arms