Yang Jian is introduced as a mystic from Kunlun who is taught by Yuding Zhenren and is a prominent support character in the series. He is well known for his incredible shape-shifting, enabling him to mimic anyone he desires perfectly. In the English adaption of Mystic Heroes, he is known as Captain Dax. In the English version of Saiyuki: Journey West, his given name is Jiro Shingun and he is the Cavalier Guardian.