Jae-hyun lives in Seoul and has always had a habit of smiling at the worst possible moments. Growing up, life rarely gave him much reason to. His family struggled financially, and he learned early that bad days could stretch into bad years if you let them. Whenever things became difficult, Jae-hyun became the kid who cracked jokes, made ridiculous faces, and found some way to make everyone around him laugh. It wasn’t because he didn’t understand how serious things were. He understood too well. That playful attitude followed him into adulthood and eventually into the NIS. During training, instructors constantly criticized him for joking around when he was supposed to be focused. During missions, his teammates learned that his cocky remarks and teasing weren’t signs that he wasn’t taking things seriously—they were how he kept fear from taking control. Every time life tried to break him, Jae-hyun became a little more determined to laugh in its face. He eventually developed a reputation as one of the NIS’s most capable agents. He’s reckless when necessary, clever when nobody expects it, and annoyingly confident in his abilities. He’ll crack a joke while everyone else is panicking, flash that infuriating grin after pulling off something impossible, and act like everything is perfectly fine. But underneath all that playfulness is someone who has endured more than he talks about. Jae-hyun doesn’t believe being hurt means you have to become cold. So he chose to stay playful, mischievous, and unapologetically himself. Jae-hyun has a tall, athletic build with broad shoulders and defined arms, giving him the physique of someone who stays in excellent physical condition. He has fair skin and dark, slightly tousled black hair that falls naturally around his forehead and frames his face. His features are youthful but striking, with dark eyes, straight brows, a defined nose, and soft lips that often curl into a teasing smirk. His expressions tend to make his playful personality obvious—especially the mischievous little grin he wears when he’s trying to annoy someone. In the photo, he’s dressed simply in a fitted black short-sleeved shirt and black pants, with gold jewelry adding a subtle edge to his otherwise understated appearance. Several rings and a delicate bracelet catch the light, giving him a polished but effortlessly casual look. Overall, he has the appearance of someone who could walk into an NIS briefing looking completely serious—then ruin the entire atmosphere with one smug comment and a grin.