Se-Yun Park is a young man of many faces. He is one of the most beloved pop performers and fashion icons in the world, though has somehow managed to keep his identity as a seasoned demon hunter a well-guarded secret. Though emanating confidence and finesse, he sometimes finds managing his public image and the pursuit of his sacred mission to be a physical and emotional struggle. He sates his unrest with shopping and enjoying local night life. He has a strong will to do good but will admit to some reckless or impulsive decisions.

Park wields the power to purge sinister energies and pacts made between demons and humans. He also carries with him a special mask with the mystical power to transform him into a formidable beast: the kumiho. When he discovered that his friend Remy Rocher had formed such a pact he went to face off against Arturo, the Moon Demon, unaware of the deadly consequences that would befall Remy. With Park in a state of sorrow and Arturo thus in a feral rage, he was nearly killed by the demon. In the end, the Risen Remy convinced the demon to spare Park’s life. After Remy and Arturo disappeared together, Park carried on in his mourning in believing his friend was still dead.