Protodroid

The Protodroid is a robot that was created to combat the Cardroids as the first Masked Driver. It is also known as Cardroid 000 by others, and it takes a human form called Zero. Later, it was "killed" by Cardroid 002 and Cardroid 003 rebooted it as Zero Cardroid, a Cardroid tasked with reseting the cores of rogue Cardroids. However, in Episode 15 it found out that it was the prototype of Masked Driver, until it was brainwashed again by Joethewinner256's favourite character in the Masked Driver series.

The programming was edited so that the protodroid thought it protected Cardroids instead of humans. After Episode 22, Protodroid was reset again for a third time, where it became good again, but this time as Masked Rider Zero.