The Kaizoku Halfbody (海賊ハーフボディ, Kaizoku Hāfubodi, lit. Pirate Halfbody) is a biotic A-Side Halfbody of Kamen Rider Build. Accessed through the Kaizoku Fullbottle, its Best Match is the Densha Halfbody. In any form using the Kaizoku Fullbottle, Build wields the Kaizoku Hassyar. Marine Head Armor (マリンヘッドアーマー, Marin Heddo Āmā) - The azure head armor. When hit by an attack, it will undulate and sway (like a wave in the sea), absorbing and spreading the impact to reduce damage. Left Eye Kaizoku (レフトア