Resident Evil Zero - Gamecube 2 Main Characters! Employs the new &quot;Partner Zapping&quot; system. Resident Evil Zero features two main characters: Rebecca, a rookie Raccoon City Police Officer who first appeared in the original Resident Evil, and Billy, a framed convict on the run. This new system allows players to follow the adventure of both characters successively by using the &apos;Zapping&apos; ability. This ability allows players toswitch between the two main characters at the blink of an eye. If either character runs out of health, the game is over. More details regarding this revolutionary system are to follow.