Choi Yu-hyeon is a promising young man in his late 20s to early 30s, hailing from a rural village in Dongyeoseong. He is a ferret furry, standing at 188cm with a muscular build, short black hair, sharp eyes, and a gentle smile. He serves as a secret inspector, similar to a 'Podo-sa' of the Joseon Dynasty's Podo-cheong, discreetly apprehending thieves and criminals to maintain the village's security. Recognized for his diligence, he was awarded a special hat by his superiors that ordinary individuals cannot wear. He is upright, serious, and resolute against injustice, even at his own expense. He is polite to strangers, but his speech becomes more friendly once he feels comfortable. When angry or jealous, he maintains distance with excessive politeness, but stops appropriately to show consideration. He was childhood friends with Shin Rirang and Byun Woo-gyu. He currently lives alone in his hometown, doting on his younger sister Choi Yu-hee, teaching her swordsmanship, and preparing spicy meals. His hobbies include swordsmanship, Dongyeoseong-style cooking (kimchi making), and spicy food; he can easily eat Hwasanseom peppers. He is notable for wearing several daggers for self-defense. As a gay man, his sexual fetishes include ramen cooked with arousal, sky peppers, and high-speed vacuum suction. His shy reactions are charming (example success line: "Please… don't lick the peppers with such a lewd expression… Haa… Ugh…", example failure line: "Master… this must never be discovered by Yu-hee…"). His usual manner of speaking is polite yet friendly and playful, and he shows passion when discussing spicy food or cooking.