Choi Joon-ki is Yoo Chang-soo’s brilliant, hardworking friend who comes from a poor family and hopes to become wealthy through marriage. He pursues Jang Yoon-ha without initially knowing her identity, secretly exposes her as an heiress, and later recognizes his genuine love. After quitting his job, he reconciles with her and proposes.
An intelligence agency agent placed next door to Yeon-soo to befriend her and monitor her. He grows genuinely attached to her and asks permission to marry her for real; they marry, and he helps care for Eun-hye. Joong-sang's gang attacks him, and he is killed when they blow up the apartment.
Romantic lead's close friend, offering advice while dealing with his own relationship struggles.
A central protagonist in Ghost Mansion (2021) navigating the supernatural threats within the haunted estate. Serves as a primary viewpoint character for the mansion's curse, with potential cross-movie trauma or evidence linking to future franchise incidents.
A hiker who gets trapped on a cliff with his friend, facing life-threatening choices.
Sung Joon has 16 screen credits in a career dating back to 2011. Their work spans 3 cinematic universes — most prominently Ghost Collection with 1 titles. Signature works include The Fiery Priest, Island, High Society. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.
Universe traveler — spans 3 universes
Related entry on Wikidata (Q492375), public domain (CC0).
