Jeong Ji-hoon expressed his affection for the character, saying, “The Do-yoon character, who acts like a device that provides dramatic elements in storytelling, was interesting and attractive.”
He also showed extraordinary passion, saying, "What I focused on when filming the action was, 'Let's not do the action we've seen before.' So, except for the dangerous stuff, I did most of it myself."
Director Park Hong-gyun said, "I was impressed because he was an actor who worked so hard that there was no disagreement. I think this work survived a lot thanks to actor Jeong Ji-hoon," and said that he played the role of Seo Do-yoon, a bodyguard who has both the reliability of protecting Wan-su and the meticulousness to uncover secrets. I praised Jeong Ji-hoon for his perfect performance.