Despite the fact that he appears to be a bishōnen of similar age to Ren, and his self-acclaim of being a Taoist-in-training, he is, in reality, a Taoist immortal whose age is measured in centuries. Lonyue came to Japan to retrieve artifacts stolen from his master, befriending Ren along the way. After recovering the lost artifacts, he opted to stay in Japan because he was bored. Lonyue, like Kazuma, teases and manipulates others in order to accomplish his goals.
Lonyue has the ability to control and manipulate his surroundings at will due his mastery of the way of Tao. His true powers are never shown, but Kazuma is revealed to have a genuine fear of fighting Lonyue again, as Lonyue was the first one Kazuma lost to in a fight since his training; even after becoming a Contractor, Kazuma is not confident in winning against him.
Lonyue has only appeared in the Kaze no Stigma: Ignition side stories.