Killbus

Killbas (キルバス) is the older brother of the late Evolto and the main antagonist of Kamen Rider Build NEW WORLD: Kamen Rider Cross-Z. Killbas is able to transform into Kamen Rider Killbas (仮面ライダーキルバス) to take revenge of his brother's death.

Devices

 * Build Driver
 * Unknown transformation item

Weapons

 * Drill Crusher
 * Kaizoku Hassyar

Portrayal
Killbas is portrayed by Gaku Shindo (進藤 学) and his voice is provided by Anri Katsu (勝 杏里). As Kamen Rider Killbas, he is portrayed by an unknown suit actor.