Now Depart for the Front Line! Kachidoki Arms!

Now Depart for the Front Line! Kachidoki Arms! (いざ出陣！カチドキアームズ！) is the twenty-third episode of Kamen Rider Gaim. This episode marks the debut of Gaim Kachidoki Arms, as well as the proper debut of Deemushu, the first of the Overlord Inves.

Synopsis
Now aware that he killed Yuya, Kota loses all will to fight, and will not even seek to destroy the Scalar System. As he struggles with the thought of telling the truth to his friends, Kaito encounters the strange Inves in Helheim Forest, once more.

Plot
Devastated upon learning the truth about Yuya, Kota loses all will to fight, and Mitsuzane suggests to him not to tell anything about it to their friends. Meanwhile, Ryoma discusses the mission he gave to Kaito with his allies, which is to get more information about the "Overlords", which are human intelligence Inves who have managed to evolve and adapt to the Helheim Forest, claiming that it is the path mankind should follow to avoid extinction. As Kaito finally encounters and confronts the Overlord Inves he has been looking for, who attempts to introduce himself to Kaito as Dēmushu, Kota meets Mai in the place where they would have met with Yuya when he last contacted them, and he refrains from telling her the truth as Mitsuzane suggested.

Back at Drupers, Kota has another vision of the mysterious girl who supports his decision to stop fighting. Soon after, DJ Sagara appears before him, claiming that instead of just sacrificing others, there are others who pursue their dreams by fighting their way without renouncing anything, just like Kaito, and he presents Kota with the Kachidoki Lockseed and a Dandeliner Lockseed. With his will renewed, Kouta mounts the Dandeliner and launches an attack on the Yggdrasill Corporation headquarters. A team of Kurokage Troopers are dispatched to stop him, but there is little they can do to stop Armored Rider Gaim's new form, Kachidoki Arms, and are defeated by his varied attacks through the DJ Gun. Takatora appears to confront him as Zangetsu Shin, but fails to stop Gaim from destroying the Scalar System.

Gaim then flees, after declaring that with their contigency plan destroyed, the Yggdrasill Corporation has no option but to find a way to stop the Helheim Forest's invasion. The mysterious girl reprimands DJ Sagara for interfering with Kota's decision, but he points out that she also did the same, as in the end, all that matters is who will be the one to be chosen by the Helheim Forest. Enraged with the recent developments, Ryoma contacts Mitsuzane and instructs him to investigate Kota in order to find out who betrayed the Yggdrasill Corporation and is assisting him.

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), Mysterious Girl (謎の少女): Yuumi Shida (志田 友美)
 * Takatora Kureshima (呉島 貴虎): Yuki Kubota (久保田 悠来)
 * Lock Dealer Sid (錠前ディーラー シド): Kazuki Namioka (波岡 一喜)
 * Ryoma Sengoku (戦極凌馬): Tsunenori Aoki (青木玄徳)
 * Yoko Minato (湊 耀子): Minami Tsukui (佃井 皆美)
 * DJ Sagara (DJサガラ): Tomomitsu Yamaguchi (山口 智充)
 * Kiyojiro Bando (阪東 清治郎): Tomohisa Yuge (弓削 智久)
 * Deemushu (デェムシュ): Tomokazu Sugita (杉田 智和)
 * 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, Kachidoki
 * Baron:
 * Banana, Mango
 * Zangetsu Shin:
 * Melon Energy
 * Arms Change:
 * Gaim:
 * Orange Arms, Kachidoki Arms
 * Baron:
 * Banana Arms, Mango Arms
 * Zangetsu Shin:
 * Melon Energy Arms