The Unstoppable Hazard

The Unstoppable Hazard (ハザードは止まらない) is the twenty-first episode of Kamen Rider Build. This episode properly showcases the abilities of Build's RabbitTank Hazard Form after its' brief appearance at the end of the previous episode. Also debuting are Build's RoseCopter Best Match and RoseSoujiki Trial Form, as well as a tease of his TurtleWatch Best Match, and the death of Aoba.

Synopsis
Fighting with the forbidden item, the Hazard Trigger, has transformed Sento into a dark version of Build, known as a “Hazard Form”. If he continues to fight using the Hazard Trigger, according to Katsuragi’s words, he will lose his sense of self. Sento is using the same technology the enemy has been using on himself! But Build loses consciousness during the fight. And then, Build stands before the Hokuto Trio as he decides to finish his fight against them…

Plot
to be added

Cast

 * Sento Kiryu (桐生 戦兎): Atsuhiro Inukai (犬飼 貴丈)
 * Ryuga Banjou (万丈 龍我): Eiji Akaso (赤楚 衛二)
 * Kazumi Sawatari (猿渡 一海): Kouhei Takeda (武田 航平)
 * Misora Isurugi (石動 美空): Kaho Takada (高田 夏帆)
 * Sawa Takigawa (滝川 紗羽): Yukari Taki (滝 裕可里)
 * Soichi Isurugi (石動 惣一): Yasuyuki Maekawa (前川泰之)
 * Taizan Himuro (氷室 泰山): Meikyo Yamada (山田明郷)
 * Yoshiko Tajimi (多治見 喜子): Ryoko Gi (魏 涼子)
 * Akaba (赤羽): Eishin (栄信)
 * Aoba (青羽): Tateto Serizawa (芹澤興人)
 * Kiba (黄羽): Takuya Yoshimura (吉村卓也)
 * Blood Stalk (ブラッドスターク): Tetsuo Kanao (金尾 哲夫)
 * Build Driver (ビルドドライバー): KORBY (コービー)
 * Sclash Driver (スクラッシュドライバー): Norio Wakamoto (若本 規夫)

Guest Casts

 * Masuzawa (増沢): Taro Nakatani (中谷太郎)
 * TV Announcer: Kenya Matsuki (松木 研也)
 * Ring Announcer: Keisuke Hara (原 圭介)

Suit Actors

 * Kamen Rider Build: Seiji Takaiwa (高岩 成二)
 * Kamen Rider Cross-Z (Charge): Eitoku (永徳)
 * Kamen Rider Grease: Satoshi Fujita (藤田 慧)
 * Blood Stalk: Kazuya Okada (岡田 和也)
 * Castle Hazard Smash: Yuji Nakata (中田 裕士)
 * Stag Hazard Smash: Kotaro Kaji (鍜治 洸太朗)
 * Owl Hazard Smash: Hajime Kanzaki (神前 元)

Fullbottles

 * Bottle used:
 * Build
 * Organic: Rabbit, Phoenix, Rose, Turtle
 * Inorganic: Tank, Soujiki, Helicopter, Watch
 * Other: Hazard Trigger
 * Cross-Z (Charge)
 * Organic:
 * Inorganic:
 * Grease
 * Organic:
 * Inorganic: Lock (In Sclash Driver)


 * Blood Stalk
 * Organic: Cobra
 * Inorganic:
 * Castle Hazard Smash
 * Castle
 * Stag Hazard Smash
 * Kuwagata
 * Owl Hazard Smash
 * Fukurou
 * Form used:
 * Build
 * RabbitTank Hazard Form, PhoenixSoujiki Form, RoseSoujiki Form, RoseCopter Form, TurtleWatch Form (off-screen), RabbitTank Form

Sclashjellies

 * Sclashjelly used:
 * Cross-Z Charge
 * Dragon
 * Grease
 * Robot

Errors

 * Before activating RoseCopter, the Rose Full Bottle is set back into the Driver as if Build didn't assume RoseSoujiki and the Snap Ride Builder part for the Rose Halfbody wasn't clear.
 * The 'Yay' sound isn't heard after Build assumes RoseCopter Form.