Neo Organism / Doras (voice)
Masaru Asou era el ayudante de laboratorio de genética del Doctor Mochizuki, y fue utilizado como uno de sus experimentos, permitiéndote transformar en un ser saltamontes llamado Kamen Rider ZO. Él huyó a los bosques y entró en coma antes que el Dr. Mochizuki le envió una llamada telepatica para su ayuda; él había creado el Neo Organismo, demasiado poderoso para que él lo controle. Masaru debe proteger al hijo de Mochizuki, Hiroshi, contra las criaturas hechas por el Neo Organismo.
Daisuke
A hard working salaryman takes off five days from his busy job and sets off with his wife and two children to visit his parents in his hometown for the 1991 new year holidays. He decides that they will go by car to save on expenses. Unfortunately, the long drive from Tokyo to his hometown becomes a much longer journey than expected due to traffic, sickness and other misfortunes and by the time they arrive three days later, they only have time for a short but happy visit.