Reiyon is an Hanjuujin.<br /> Quote from Chelsea when she explains what an Hanjuujin is:<br /> "Long ago, there was some research that inserted animal genes into humans.<br /> What was born from that are the Hanjuujins.<br /> The Hanjuujins are equal in strength to the elemental uesrs.<br /> But for some reason... The research was suddenly interupted.<br /> And the Hanjuujins were sent elsewhere."<br /> <br /> Reiyon first appears in the end of episode 21, but isn't introduced untill later in episode 22.<br /><br />