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Icon-build.png This article is about a/an villain in Kamen Rider Build.

"This planet, and the universe, shall all be destroyed!"
―Killbus' proclamation after transforming into Kamen Rider Killbus

Killbus (キルバス Kirubasu) is the overlord of the Blood Tribe and the main antagonist of Build NEW WORLD: Kamen Rider Cross-Z.[1]. After destroying his own planet, he spent years looking for his younger brother Evolto until he reached Earth. Upon arriving, he temporarily took the form of Sento Kiryu before preferring the appearance of Satoshi Kakizaki. Stealing Sento's Build Driver, he transforms into Kamen Rider Killbus (仮面ライダーキルバス Kamen Raidā Kirubasu).


Sometime before the start of the series, Killbus was responsible for the destruction of his own home planet, Planet Blood, as well as the one who sent his empire to destroy other planets. Before the destruction of said planet, Evolto escaped with Pandora's Box in hopes of making sure Killbus doesn't find it, prompting the latter to search for his brother.

Kamen Rider Killbus is holding Last Pandora Panel White (Adapter form).jpg

After the World of Build was merged with a parallel Earth, Killbus arrived via the White Pandora Panel and copies the appearance of Sento Kiryu and later Satoshi Kakizaki. Taking the Build Driver from Sento, Killbus obtains the means to transform into his Kamen Rider form, Kamen Rider Killbus, which is even stronger than Kamen Rider Evol. Killbus plans to restore the energy of the Pandora Box and use it to destroy the entire universe.

Later on, he fought Ryuga Banjou, and his brother, over the Pandora's Box. Due to the Box reappearing into the New World, everyone from the original World of Build got their erased memories back, excluding Sento and Ryuga as they had kept their memories during the transfer. Despite having the upper hand initially due to his rider form being stronger than Evolto, Ryuga assumed a new form, Cross-ZEvol, the fusion of his and Evolto's powers, later gaining the upper hand against him, and destroying him and the reconstructed Pandora's Box except for the original White Pandora Panel.

Video Game Appearances

Kamen Rider Buttobasoul

Kamen Rider Killbus medal

Kamen Rider Killbus is a playable character with other Kamen Rider of Showa Heisei and Reiwa in Kamen Rider Buttobasoul.


Killbus has a highly aggressive and hedonistic personality and seeks pleasure from destruction, which led to the destruction of his own planet. He wishes to use the Pandora Box to destroy the entire universe, even willing to die along with it. He does not show any type of sibling care for Evolto, even willing to kill him just so he can have the Pandora Box all for himself.

Killbus seems to be more attracted to Satoshi Kakizaki, opting to take his appearance instead of the geeky Sento Kiryu.


  • Blood Tribe Physiology: As a a member of the Blood Tribe, Killbus possesses all of the various superhuman attributes common among the Blood Tribe.
    • Hazard Level: Killbus has a Hazard Level of at least 3, as shown by his use of the Build Driver. However, his Hazard Level is likely to be at least 5+ due to him being a member of the Blood Tribe and besting Evolto in battle. Throughout the film, he effortlessly defeats Ryuga, who has a recorded Hazard Level of 7, implying that Killbus may also have the same Hazard Level as well (or higher).

      Killbas liquifies himself.

    • Liquefaction: Like Evolto, Killbus can become a teal pool of liquid for transportation purposes.
    • Venomous Tentacle: Killbus possesses a tentacle that he can use to inject his opponent with dangerous venom. This can be countered with the Genius Fullbottle.
    • Shapeshifting: While his true form has not been revealed, Killbus can mimic any human due to being a member of the Blood Tribe. He first took the form Sento Kiryu before settling on the appearance of Satoshi Kakizaki.
    • Infusion: Killbus infused Sento's pet spider robot with his own genes in order to create the Killbuspider.
    • Fullbottle Creation: Killbus created the Killbus Spider Fullbottle using his own genes.


Kamen Rider Killbus

Kamen Rider Killbus

Killbus with spider legs

"Killbuspider! Are you ready? Spider! Spider! Killbus Spider!"
―Transformation announcement[src]

Rider Statistics

  • Height: 194.5 cm.
  • Weight: 109.1 kg.

Ability Perimeters[2]:

  • Punching power: 66.1 t.
  • Kicking power: 72.4 t.
  • Maximum jump height: 88.9 m.
  • Maximum running speed: 100 m. per 0.9 sec.

Killbus transforms into Kamen Rider Killbus (仮面ライダーキルバス Kamen Raidā Kirubasu) by using the Killbuspider, with the Killbus Spider Fullbottle inserted, in the Build Driver.

Killbus' finisher is the Killbus Spider Finish (キルバススパイダーフィニッシュ Kirubasu Supaidā Finisshu), which has three variations:

  • Killbus dashes around the enemy while binding them with webbing so that they cannot move before he strikes them with his gigantic four spider legs, exploding the enemy in the process.
  • Killbus binding his enemy with webbing so that they cannot move before his gigantic four spider legs slowly moves toward them, exploding the enemy in the process.
  • Killbus attaches strands of webbing to the enemy and throws them into the air before delivering a spinning heel kick.
This form is exclusive to Build NEW WORLD: Kamen Rider Cross-Z

In any form that uses the Rabbit Fullbottle, Build is armed with the Rabbit Foot Shoes (ラビットフットシューズ Rabitto Futto Shūzu) on his left leg for increased jumping, and can summon the Drill Crusher.

RabbitTank Form

RabbitTank Form

"Rabbit! Tank! Are you ready? (Techno rock music) Hagane no moonsault! RabbitTank! Yeah!"
―RabbitTank's transformation announcement[src]

Rider Statistics

  • Rider Height: 196.0 cm.
  • Rider Weight: 99.0 kg.

Ability Perimeters:

  • Punching Power: 14.7 t. (right arm)/25.2 t. (left arm)
  • Kicking Power: 35.1 t. (right leg)/26.3 t. (left leg)
  • Maximum Jump Height: 71.5 m.
  • Maximum Running Speed: 100 m. per 1.9 sec.

RabbitTank Form (ラビットタンクフォーム Rabitto Tanku Fōmu) is Build's red and blue primary and default Best Match form form accessed from the Rabbit and Tank Fullbottles, hence known as the Moonsault of Steel (鋼のムーンサルト Hagane no Mūnsaruto). It is themed after a rabbit and a tank.

RabbitTank is considered to be the most well balanced; having a good amount of power and agility in all of his Ability Perimeters, thus making it Build's default form, despite it being capable of initiating transformation with any set of Build's Fullbottles. This is also Build's second-fastest form.

In this Best Match form, Build is armed with the Tank Roller Shoes (タンクローラーシューズ Tanku Rōrā Shūzu) on his right leg for kicking attacks, and can also act as a working tread to roll along on a flat foot.

This form's weapon is the Drill Crusher.

This form is exclusive to Build NEW WORLD: Kamen Rider Cross-Z

In any form that uses the Harinezumi Fullbottle, Build is armed with the Spine Knuckle (スパインナックル Supain Nakkuru) on his right fist, allowing him to clobber foes with spikes that extend outwards when used.

FireHedgehog Form

FireHedgehog Form

"Harinezumi! Syoubousya! Best Match! Are you ready? (Rock music with sirens) Rescue kenzan! FireHedgehog! Yeah!"
―FireHedgehog's transformation announcement[src]

Rider Statistics

  • Rider Height: 190 cm.
  • Rider Weight: 103.7 kg.

Ability Parameters:

  • Punching Power: 13.7 t. (right arm)/11.9 t. (left arm)
  • Kicking Power: 14.7 t. (right leg)/14 t. (left leg)
  • Maximum Jump Height: 36.5 m.
  • Maximum Running Speed: 100 m. per 6.4 sec.

FireHedgehog Form (ファイヤヘッジホッグフォーム Faiya Hejjihoggu Fōmu) is Build's white and scarlet-colored Best Match form accessed from the Harinezumi and Syoubousya Fullbottles, hence known as the Rescue Kenzan (レスキュー剣山 Resukyū Kenzan). It is a Touto Best Match, and is themed after a hedgehog and a fire engine.

In this Best Match form, Build is armed with the Multi Deluge Gun (マルチデリュージガン Maruchi Deryūji Gan) on his left arm that can shoot water, fire, or extend.

This form give build balanced boost in punching, kicking and jumping power, albeit at the cost of his running speed.

This form is exclusive to Build NEW WORLD: Kamen Rider Cross-Z



  • Build Driver - Transformation device, stolen from Sento Kiryu.
  • Killbuspider[3] - Kamen Rider Killbus' slot adapter for the Build Driver. Technically stolen from Ryuga's belongings.
  • Fullbottles - Transformation trinkets. Stole Rabbit, Tank, Harinezumi, and Syoubousya from Sento. Later created one on his own.



Behind the Scenes


Killbus is voiced by Anri Katsu (勝 杏里 Katsu Anri), who previously voiced Roidmude 106/Thief in Kamen Rider Drive. When copying Satoshi Kakizaki’s appearance, he is played by Gaku Shindo (進藤 学 Shindo Gaku), who is best known for his role as BarizorgIcon-crosswiki.png from Kaizoku Sentai GokaigerIcon-crosswiki.png. As Kamen Rider Killbas, his suit actor is Yasuhiko Imai (今井 靖彦 Imai Yasuhiko)[4].

When copying Sento Kiryu's appearance, he is portrayed by Atsuhiro Inukai (犬飼 貴丈 Inukai Atsuhiro).




  • Killbus' spider motif finished the last part of the recurring bat/cobra/spider trio in the Kamen Rider franchise, a tribute to the first two Shocker monsters as well as the first monster to be upgraded, following Blood Stalk's cobra motif and Night Rogue's bat motif.
  • Like previous V-Cinema Exclusive Riders, Killbus is made up of recycled parts from previous Rider suits. His helmet uses elements of Night Rogue/MadRogue's helmets, the shoulder and gauntlet parts are from Blood Stalk, as well as the standard Kamen Rider Build bicep armor and leg armor parts.


See Also


Icon-build.png Kamen Rider Build
Kamen Riders
Sento Kiryu (Takumi Katsuragi) - Ryuga Banjo - Kazumi Sawatari - Gentoku Himuro - Evolto - Nariaki Utsumi - Shinobu Katsuragi
Movie-exclusive: Kengo Ino - Killbus - Keiji Uraga
Drivers/Transformation Gear
Build Driver - Transteam Gun - Nebulasteam Gun - Sclash Driver - Evol-Driver
Transformation Devices
Fullbottles - (Great) Cross-Z Dragon - Sclashjellies - Hazard Trigger - Cross-Z Magma Knuckle - Evol-Trigger - Grease Blizzard Knuckle - Killbuspider - Grease Perfect Kingdom
Drill Crusher - Hawk Gatlinger - 4Koma Ninpoutou - Kaizoku Hassyar - Fullbottle Buster - Steam Blade - Beat Closer - Twin Breaker - Muscle Glove - Solstall Wings - Giant Scratcher - Space Ride Arm - Spine Knuckle - Long Range Cleaner - Trash Converter - Gold Lio Gauntlet - Multi Deluge Gun
Pandora Box - Halfbodies - Fullbottle Holder - Build Phone
Vortex Finish - Hazard Level - Project Build - Sky Wall - Nebula Gas
nascita: Misora Isurugi - Soichi Isurugi - Sawa Takigawa - Kazumi Sawatari - Gentoku Himuro
Kamen Riders: Eiji Hino - Gentaro Kisaragi - Kouta Kazuraba - Takeru Tenkuji - Emu Hojo - Hiiro Kagami - Taiga Hanaya - Kiriya Kujo - Kuroto Dan - Parado - Sougo Tokiwa - Geiz Myokoin - Tsukuyomi
Prime Ministers: Taizan Himuro (Touto) - Yoshiko Tajimi (Hokuto) - Masakuni Mido (Seito)
Namba Heavy Industries Ltd.: Juzaburo Namba - Nariaki Utsumi - Haruhiko Wanibuchi - Guardian
Hell Bro's: Fu Washio - Rai Washio - Yoshikazu Takahashi - Norio Matsui
Aliens: Vernage
Gentoku Himuro - Evolto - Nariaki Utsumi - Takumi Katsuragi - Shingo Kuwata - Eita Kawai - Yoshikazu Takahashi - Norio Matsui
Normal Smash: Fang Smash - Needle Smash - Strong Smash - Burn Smash - Flying Smash - Mirage Smash - Square Smash - Press Smash - Ice Smash - Stretch Smash
Empowered Smash: Strong Smash Hazard - Press Smash Hazard - Stretch Smash Hazard - Flying Smash Hazard
Hard/Hazard Smash: Castle Hard/Hazard Smash - Stag Hard/Hazard Smash - Owl Hard/Hazard Smash
Clone Smash: Press Clone Smash - Stretch Clone Smash - Strong Clone Smash - Flying Clone Smash
Lost Smash: Owl Lost Smash - Stag Lost Smash - Castle Lost Smash - CD Lost Smash - Scissors Lost Smash - Zebra Lost Smash
Foundation X
Kaisers: Kaisei Mogami (World of Build, World of Ex-Aid) - Nebula Bugster
Blood Tribe
Kengo Ino - Ryoka Saiga - Mitsuomi Gobara - Evolto - Killbus - Akaba (imitation) - Aoba (imitation) - Kiba (imitation) - Remocon Bro's (imitation) - Engine Bro's (imitation)
Down Fall
Keiji Uraga - Simon Marcus (Phantom Crusher)