Zero is the son of Ultraseven. He was trained under Leo after he was banished from the Land of Light by his father for attempting to take the Plasma Spark for himself. His training ultimately led to his redemption in his battle with Belial, who would become Zero’s archnemesis.

Wild Burst is a state where Zero unleashes his inner instincts and fights in a completely unpredictable style. Learned from training with Ultraseven, Leo, and Joneus, in response to losing to Absolute Tartarus.