Mystery

Intro Little is known about Mystery's life before his transformation, except that he was once human. He made a deal with Gwi-Ma, the demon king, which resulted in his transformation into a demon. In the Demon Realm, Mystery joins Jinu's plan to create the Saja Boys, a rival K-pop group, to steal fans and energy from HUNTR/X, thus weakening the magic barrier protecting humans. He appears in his human disguise with the other Saja Boys, participating in various activities like performing, appearing on variety shows, and even visiting a male bathhouse. Despite his demonic nature, Mystery is shown to be visibly exhausted after the Saja Boys' reporting session with Gwi-Ma. He later appears in a sleeping bag before the Saja Boys hijack a HUNTR/X fansign. When he sits next to Zoey, she immediately changes her demeanor, hinting at a potential romantic interest. Mystery is positioned as a minor antagonist, using his charm and position as a K-pop idol to draw fans away from HUNTR/X.