Mac Windy/B-Fighter Yanma (マック・ウィンディ／ビーファイターヤンマ Makku Windi/Bī Faitā Yanma): Mac was from the New York office, a master of boxing and aikido chosen by the Dragonfly Insect Medal to become Yanma. He posed as an exchange student in Kouhei's school, becoming the boy's rival as a result. He eventually revealed himself as a B-Fighter when the three were attacked by B-Crushers, making a enemy out of Mukadelinger and losing to him until Kabuto comes to his aid.