This article is about a/an villain form used by several identities in Kamen Rider Build.

Blood Stalk (ブラッドスターク Buraddo Sutāku) is a Transteam System transformation assumed by the following characters:


Blood Stalk

Blood Stalk

Stalk Cobra attack

Stalk's cobra head attack

BS Snakes

Two giant Cobra projection.

"Cobra! Mistmatch! Co-Co-Cobra... Cobra... Fire!"
―Transformation announcement[src]
  • Height: 201.5 cm.
  • Weight: 102 kg.

Ability Perimeters:

  • Punching power: 19 t.
  • Kicking power: 22 t.
  • Maximum jump height: 40 m.
  • Maximum running speed: 100 m. per 4.7 sec.

Similar to Night Rogue, Blood Stalk accesses his main form with the Transteam Gun and the Cobra Fullbottle. Unlike Riders and other Transteam/Kaiser system users, "Soichi" is almost always seen transformed into Blood Stalk after his identity has been revealed to Sento and the others at nascita.

His stats are not only stronger than most of Build's forms, but also surpass Night Rogue's with only speed being slightly lower than his. Stalk also possesses numerous abilities built into his suit. On each wrist, he has extendable venomous tendrils that can shoot out and stab victims, injecting them with venom capable of either paralyzing, killing, or even disintegrating them. He can also create an energy cobra projection through his suit to attack or capture targets. It has been proven that "Soichi" is extremely proficient with the Blood Stalk arsenal and its abilities granted to him; his skill with the Transteam System, coupled with his enhanced durability, has allowed him to survive multiple skirmishes with Build and Cross-Z, and defeat Night Rogue in a duel.

The true purpose of the Blood Stalk system is to encourage the rise of Hazard Levels in Riders. Thus, he is shown capable of accepting far greater punishments than either Build or Cross-Z. Instead of showing pain or discomfort, Stalk is otherwise enjoying the beatings so long that his opponent's Hazard Level rises. In order to facilitate this, Blood Stalk can measure the current hazard level of Kamen Riders/Smash by simply touching them.

Stalk states that this form is merely temporary, as he uses powers acquired from Mars to stay toe to toe with enemies that are supposed to be stronger than what the Transteam System can put out. This is is shown when Stalk was able to fight on par with Build's RabbitTank Sparkling form while Night Rogue was easily defeated by it.

Blood Stalk also has several non-combat abilities. As mentioned by Takumi himself, Stalk's equipment has the ability to change its user's voice tone freely to hide his identity. It is later revealed that the alternate voice is that of the entity possessing "Soichi". The Truth of the Pandora Box. Stalk is also able to activate the Guardians’ true programming as sleeper agents of Faust by snapping his fingers. When in need of a quick escape, he can escape any situation by becoming a cloud of red smoke and flowing away.

Blood Stalk consist of the following parts:

  • Blood Stalk Head (ブラッドスタークヘッド Buraddo Sutāku Heddo): Blood Stalk's helmet.
    • Central Stalk (セントラルスターク Sentoraru Sutāku): A chimney unit mounted on Blood Stalk's head. It has a heat removal function, a function to disperse toxic gas, and can also launch special bullets.
    • BS Side Blade (BSサイドブレード BS Saido Burēdo): Data collection system in Blood Stalk's helmet. It collects data in real time, and performs emergency repair on damaged parts of the suit. It also manages the condition of the body.
    • Cobra Head Goggles (コブラヘッドゴーグル Kobura Heddo Gōguru): Transparent goggles to protect Blood Stalk's face. The built in ultrasonic sensor allows him to fight in complete darkness.
    • Hide Seeker Eye (ハイドシーカーアイ Haido Shīkā Ai): Blood Stalk's eyes. They It has a built in night vision sensor, and can detect heat sources and movement.
    • Air Face Duct (エアフェイスダクト Ea Feisu Dakuto): A built in gas mask in the helmet. It removes harmful substances from the air when breathing and can discharge toxic gases.
    • BS Face Guard (BSフェイスガード BS Feisu Gādo): Device that protects Blood Stalk's head. In response to an enemy's physical attack, it emits a wave that cancels out the impact to nullify the damage.
  • Cobra Chest Armor (コブラチェストアーマー Kobura Chesuto Āmā): Blood Stalk's chest armor. The chest is equipped with a device called Steam Generator (スチームジェネレーター Suchīmu Jenerētā) that increases user's fighting ability. It can also accelerate the user's movement speed and attack power.
  • BS Unlimited Suit (BSアンリミテッドスーツ BS Anrimiteddo Sūtsu): Shock resistant bodysuit of Blood Stalk. It can release the physical limiter and unleash the hidden physical ability of the user while offering protection from damage.
  • BS Cobra Shoulder (NRスチームショルダー BS Kobura Shorudā): Blood Stalk's shoulder armor. They optimize arm movement to improve attack accuracy. A small plant is built inside to produce toxic gases and enhance the user's capabilities.
  • Venom Rush Arm (ヴェノムラッシュアーム Vu~enomu Rasshu Āmu): Blood Stalk's arms. They increase speed and power, and are equipped with the Sting Viper (スティングヴァイパー sutinguvu~aipā) tendrils which can be used to inject poison into enemies.
  • BS Cobra Glove (BSコブラグローブ BS Kobura Gurōbu): Blood Stalk's gloves. They are reinforced, and have sharp claws at the fingers to allow for slashing attacks.
  • Metal Knee Bat (メタルニーバット Metaru Nī Batto): Blood Stalk's knee pads. They optimize leg movement to improve speed.
  • Venom Rush Leg (ヴェノムラッシュレッグ Vu~enomu Rasshu Reggu): Blood Stalk's legs. They combine power and speed and specialize in high powered knees and continuous kicks.
  • Hide Seeker Shoes (ハイドシーカーシューズ Haido Shīkā Shūzu): Blood Stalk's shoes. They suppress sound for stealth attacks, and can emit special steam for a kick attack.

With the Steam Blade or the Steam Rifle, he can use the following attacks:

  • Elek Steam (エレキスチーム Ereki Suchīmu): Blood Stalk shoots electricity at the enemy.
  • Ice Steam (アイススチーム Aisu Suchīmu): Blood Stalk performs an icy slash at the enemy causing them to freeze.
  • Devil Steam (デビルスチーム Debiru Suchīmu): Blood Stalk fires a "steam" bullet which will home in on the target and inject them with a dose of Nebula Gas. When used on a human, the person will turn into a Smash; when used on a Smash, the Smash will grow to gigantic proportions and their host will lose all memories once freed.

Blood Stalk has 4 finishers:

  • Transtream Gun finishers:
    • Steam Break (スチームブレイク Suchīmu Bureiku): Blood Stalk channels the powers of a Faust Fullbottle and performs a powerful blast attack.
      • Cobra: Blood Stalk shoot a purple energy ball that detonates upon impact.
    • Steam Attack (スチームアタック Suchīmu Atakku): Blood Stalk channels the powers of a normal Fullbottle and performs a powerful blast attack.
  • Steam Rifle finishers:
    • Steam Shot (スチームショット Suchīmu Shotto): Blood Stalk channels the powers of a Faust Fullbottle and performs a powerful steam blast attack.
      • Cobra: Blood Stalk shoot a purple cobra energy blast that detonates upon impact.
    • Steam Attack (スチームアタック Suchīmu Atakku): Blood Stalk channels the powers of a normal Fullbottle and performs a powerful steam blast attack.
      • Rocket: Blood Stalk shoots a powerful blast attack that takes the form of a rocket. The rocket flies around the enemy before coming to the ground for an explosion.

Appearances: Build Episodes 3-14, 16-17, 19-21, ROGUE Episode 2, Raising the Hazard Level ~7 Best Matches~ ("Next Chapter", "Final Chapter"), Build 22-24, 28-34, 41 (flashback; archive footage only), NEW WORLD: Kamen Rider Cross-Z[1]

Red Guardian Union (damaged)

Guardian (Union State), red version

When multiple Guardians are combining into their larger battle robot form, the Guardian (Union State) (ガーディアン(合体状態) Gādian (Gattai Jōtai)), Blood Stalk can merge with it to become a red variant that he can control.

Appearances: Build Episode 10

Behind the scenes


Blood Stalk is portrayed by suit actor Kazuya Okada (岡田 和也 Okada Kazuya).


See Also

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