The is the coordinator of Gen Jūken, its leader and the series antagonist. Although he calls himself a master of the , Long is not a human but an immortal known as the "Infinite Dragon", a many-headed golden dragon with terrible power who manipulates humanity on a whim. Because of his immortality and evil nature, Long found the world dull and decided to make it interesting by creating a Destroyer. This led to Long manipulating Maku, whom he trained to be the Destroyer while secretly aiding in the foundation of the Rin Jūken Akugata. But after the Kensei sealed Maku and the Kenma, Long was forced to wait until another pawn surfaced to replace Maku. Years later, Long found an ideal pawn in Rio, murdering the young boy's family and leaving him with a need to become strong to escape the memory of that moment. Long mortally wounded Dan years later before decimating the village where Jyan was born to insure no interference from Dan's family. Long then set up the Gen Jūken school, using the to convert some into his servants.