This article is about a/an transformation device in Kamen Rider Zero-One.

"Zetsumerise! (Progrisekey's transformation announcement)"
―Transformation announcement[src]

"(Progrisekey prefix) Nova![1]"
―Finisher announcement [src]

The Zetsumeriser (ゼツメライザー Henshin Beruto Zetsumeraizā) is a transformation device used to transform Humagears into Magia. Attaching the Zetsumeriser to a Humagear corrupts its protocols and replaces them with a desire to destroy humans. The corrupted Humagear can then use a Zetsumerisekey in the Zetsumeriser to transform into the associated Magia form.


The Zetsumeriser is composed of the following parts:

  • Rise Regulator (ライズレギュレダー Raizu Regyuredā): The Zetsumeriser's control device. In addition to stabilizing the transformation, it is also responsible for establishing a forced connection to through the Thorn Connectors (ソーンコネクタ Sōn Konekuta) and downloading their program.
  • Zetsumerise Slot (ゼツメライズスロット Zetsumeraizu Surotto): Slot for inserting Zetsumerisekeys. An imitation of the Progrisekeys' authorization system is performed by securing the Zetsumerisekey with the Worm Terminal and emitting a special signal. This process is specialized for Zetsumerizekeys, as inserting a Progrisekey carries a risk of malfunction.
  • Zetsume Loader (ゼツメローダー Zetsume Rōdā): Initiates transformation. After it is pressed, the data in the Zetsumerisekey is extracted and sent to the Humagear. This also purges the exterior of the Humagear.
  • Worm Terminal (ワームターミナル Wāmu Tāminaru): The connection terminal. It can create several extendable tubes that are capable of penetrating surfaces. When transformation is initiated, it destroys the Zetsumerisekey's Trans Lock Cylinder and pierces its interior to make a forced connection.
  • Riser Body (ライザーボディ Raizā Bodi): The main body of the Zetsumeriser. Because it is equipped with the minimum systems necessary for corrupting Humagears and extracting data from a Zetsumerizekey, the only means to stop its functionality is to destroy it.


Attaching the Zetsumeriser to a Humagear corrupts its protocols and replaces them with a desire to destroy humans. The corrupted Humagear can then use a Zetsumerisekey in the Zetsumeriser to transform into the associated Magia form. To transform into a Magia, the Humagear user inserts a Zetsumerisekey and presses the Zetsume Loader. Doing so results in several tubes piercing the Zetsumerisekey and fracturing its surface. In addition, the Humagear's human disguise is burned off and its faceplate folds back, revealing its internal skull. Dozens of tubes are then produced from its mouth and the data inside the Zetsumerisekey fuses with the Humagear, completing the transformation. After transformation, the Zetsume Loader can be pressed again to initiate a finishing attack.


  • Zetsumetsu Nova (ゼツメツノヴァ Zetsumetsu Novā): The Dodo Magia performs a simultaneous red energy slash with both Valk Sabers.


  • The Zetsumeriser's design is similar to the V-Buckle from Kamen Rider Ryuki.
    • Interestingly, the DX Progrisekeys are able to be inserted into the DX V-Buckle as DX Progrisekeys have similar dimension with DX Advent Decks. CSM Advent Decks, on the other hand, couldn't do so as their size are bigger (close to real size in KR Ryuki series).
  • The transformation sequence of a Humagear into a Magia is similar to Nariaki Utsumi’s transformation into Kamen Rider MadRogue from Kamen Rider Build.
  • The Thorn Connectors are akin to the armbands of the Amazons Register.
  • The Zetsumeriser shares a similar design to the dangerous experimental belts from Kamen Rider 555.


Icon-zero-one Kamen Rider Zero-One
Kamen Riders
Soreo Hiden - Aruto Hiden - Isamu Fuwa - Yua Yaiba - Jin - Horobi - Ikazuchi - Naki - Gai Amatsu - Ark
Movie-exclusive: Soreo Hiden
Hiden Zero-One Driver - A.I.M.S. Shotriser - MetsubouJinrai Forceriser - Zetsumeriser - ZAIA Thousandriver - Cycloneriser - Raidriser - ZAIA Slashriser - Ark Driver-Zero - Hiden Zero-Two Driver - Progrisekeys - Progrise Holder - Progrisekey Connector - Hiden Risephone - Attache Calibur - Attache Shotgun - Attache Arrow - Breaking Mammoth - Giger - Valk Sabers - Authorise Buster - Assault Grip - Thousand Jacker - Progrise Hopper Blade - ZAIASpec
Hiden Intelligence: Korenosuke Hiden - Soreo Hiden - Jun Fukuzoe - Sanzo Yamashita
Humagears: Izu - Shesta - Soreo Hiden - Wazu Nazotoku - Subaru - Hakase Bot - Fukkinhoukai Jiro
Legend Riders: Sougo Tokiwa - Geiz Myokoin - Woz - Tsukuyomi
Humans: Norio Uozumi - Go Sakurai - Satoshi Sakurai - Choichiro Ishizumi - Seiji Tazawa - Satō - Yuta Yomura - Isao - Shinya Owada - Ichikyo Amatsu
Humagears: Mageana - Ikkan Nigiro - Anna - Mashirochan - Dr. Omigoto - Z #5 - Delmo - Love-chan - Midori
A.I.s: Zea - Zat - Ai-chan - Thouser
Ark - Horobi - Naki - Jin - Ikazuchi - Little Assassin - Azu
Monsters: Berotha Magia - Kuehne Magia - Ekal Magia - Neohi Magia - Onycho Magia - Vicarya Magia - Gaeru Magia - Mammoth Magia - Dodo Magia - Arsino Magia
Footsoldiers: Trilobite Magia - Dodo Magia Chick - Battle Magia
Other Villains:
Finis - Will
Gai Amatsu
ZAIASpec Representatives: Rentaro Tachibana - Tatsumi Arayashiki - Naoto Ichimori - Takeshi Homura - Masamitsu Yudo
Other: Daiki Kyogoku
A.I.M.S.: Eida - Ono - Degawa - Shida - Eifuku - Ito
Monsters: Crushing Buffalo Raider - Splashing Whale Raider - Dynamaiting Lion Raider - Storming Penguin Raider - Scouting Panda Raider - Fighting Jackal Raider
Footsoldiers: Invading Horseshoe Crab Raiders
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