Zero, who obtained the "Hear of Holyt" in the final battle with Vice, now has the golden Sacred Armor. He has mastered the secret technique of the Thunder Sword, and in a world where the Union Clan has disappeared, he stands alone against the powerful Zanscare Clan.

The Phoenix Bowgun, an original weapon for the Chibi Warriors, can also be used as an armor base. As a Sacred Dragon Knight, Zero has made the Thunder System, a hierarchy of secret techniques from the Dragon Machine to the Sacred Dragon Giant God, his own.