Quartzer

Quartzers (無) is an mysterious time-traveling group and the main antagonist of Kamen Rider Zi-O: Over Quartzer. The group consists of Ohma Zi-O-like Kamen Riders who are able to utilize the Ridewatch powers of Showa-era Kamen Riders. All Quartzers members wear Ziku-Driver.

Members

 * Kamen Rider Barx
 * Kamen Rider Zonjis
 * Kamen Rider Zamonas