Killbus/Kamen Rider Killbus

Killbas (キルバス Kirubasu) is the older brother of the late Evolto, the last known remaining member of the Blood Tribe, and is the main antagonist of Kamen Rider Build NEW WORLD: Kamen Rider Cross-Z.[1] Killbas is able to transform into Kamen Rider Killbas(仮面ライダーキルバス Kamen Raidā Kirubasu) using the Build Driver and seeks vengeance for his brother's death.