Apparently, Killbas is Evolto's Brother and he is out for vengeance for evolto's death
Evidence/Rumor: http://kamenrider.wikia.com/wiki/Killbas
Kamen Rider Killbas
Apparently, Killbas is Evolto's Brother and he is out for vengeance for evolto's death
Evidence/Rumor: http://kamenrider.wikia.com/wiki/Killbas