Prior to Contra 4, he was known as Jagger Froid in America, in Japan as Emperor Demon Gyaba (天王鬼ギャバ, Tennou Ki Gyaba). It is an alien creature that is a major antagonist throughout many of the Contra titles starting with Super Contra. He belongs to the Red Falcon organization and is the highest ranking member, potentially its leader, as he is often encountered as the final boss near the end of the games.