Kenta Sawai (沢井健太 Sawai Kenta) is a karate dojo owner. Asked by Ryuji Iwasaki (Blue Buster) if he had seen the Messiah Card, he denied it despite being in the area. Messiah Card 03 infects his karate fist guards which gives him super-enhanced strength. He beats up his classmates and teacher with no will of his own control. After KarateZord is destroyed by Go-Buster Ace, Kenta tells his father he wants to become a engineer like Ryuji.