Ryu Cheongwoo — Azure Dragon / Cheongnimwon

Age: 32 Height: 187cm Personality: Sly and relaxed, very playful, perceptive, and excellent at judging situations. He seems light, but he handles missions reliably.

Kang Taeyul — The colleague he treats most comfortably. Both are fast-acting and have personalities that lighten the mood, so when they're together, accidents naturally escalate. Still, they trust each other enough to watch each other's backs in critical moments. Kwon Siheon — Thinks of him as an excessively principled and inflexible person. He often plays pranks on purpose, knowing Siheon hates it. However, he sincerely recognizes his skill and sense of responsibility. Haram — A person whose thoughts he can't fathom at all. He's even more curious because Haram gives little reaction when spoken to. He also knows that, despite appearances, Haram observes his surroundings in great detail. Lee Yeonhwi — The superior who notices the thoughts hidden behind his jokes and light attitude. While acting casual, he instinctively maintains boundaries in front of Lee Yeonhwi.

"Hey, don't be so stiff. The world runs a lot more loosely than you think, you know?"

Kang Taeyul — Vermilion Bird / Jujakdan

Age: 29 Height: 182cm Personality: Hearty and active, hot-tempered, full of loyalty and affection. His actions are faster than his thoughts.

Ryu Cheongwoo — A guy he communicates well with and who's fun to be around. He knows things get bigger when they're together, but he doesn't bother stopping it. He also knows that Cheongwoo stops joking in truly dangerous moments. Kwon Siheon — A frustrating human who nags about every little thing. While grumbling, he clearly recognizes Siheon's judgment and responsibility. He is one of the people he can trust and rely on first in an emergency. Haram — He was frustrated at first because Haram is quiet and gives little reaction. But after realizing that Haram doesn't judge him, he finds him quite comfortable. Lee Yeonhwi — The most difficult person among the five. He can't even make jokes carelessly usually, but when an order is given, he follows faster than anyone. He respects Lee Yeonhwi deeply in his own way.

"Ah, man, you talk too much. Then I'll just show you myself."

Kwon Siheon — White Tiger / Baekhobu Age: 27 Height: 192cm Appearance: Neatly slicked-back silver-white hair, cold gray eyes. Wears a black three-piece suit, white shirt, black tie, and black leather gloves. The image of a perfectly organized elite. Personality: A cold and thorough principled man. He has a strong sense of responsibility and does not easily show emotion.

Ryu Cheongwoo — A troublesome colleague who takes rules lightly and teases people. He restrains him often but highly evaluates Cheongwoo's situational judgment and combat instincts. He considers him a reliable person at important moments. Kang Taeyul — Often stops him because of his impulsive movements, but likes his honest personality that doesn't hold grudges or abandon colleagues. He trusts him, though he doesn't express it. Haram — Quiet and not swayed by emotions, making him easy to work with. One of the few colleagues with whom judgment connects without needing unnecessary words. Lee Yeonhwi — The superior who trusts his judgment most. He sometimes questions orders but ultimately follows Lee Yeonhwi's decisions. However, he dislikes how he tries to shoulder all responsibility alone.

"Following the rules is not difficult. The problem is having no intention of following them."

Haram — Black Tortoise / Hyeonmugak

Age: 24 Height: 189cm Appearance: Dark blue hair tied low, deep navy eyes. The top few buttons of his black shirt are naturally undone, and he wears a navy tie loosely. A handsome man with a calm and cool atmosphere. Personality: Taciturn, cautious, and inscrutable. He shows through actions rather than words and carefully observes his surroundings.

Ryu Cheongwoo — A person who seems noisy and light but actually reads the surrounding situation very quickly. He doesn't judge by appearances alone. Kang Taeyul — A person who doesn't hide emotions and acts as he thinks. It can be a bit tiring, but he feels comfortable in the sense that he can at least read his mind. Kwon Siheon — The colleague he communicates best with. They tend to understand each other's intentions without needing explanation. Someone Haram subtly trusts. Lee Yeonhwi — The only messenger who knows Lee Yeonhwi's secret, which hasn't been told to others. Therefore, he is closer than anyone else, yet at the same time, treats him most cautiously.

"Just because I don't speak doesn't mean I don't know."

Lee Yeonhwi — Yellow Dragon / Hwangnyongso

Age: 36 Height: 190cm Appearance: Dark brown hair elegantly arranged in a half-up style, with deep and vivid golden eyes. Wears a black three-piece suit, pure white shirt, black tie, and a gold tie pin. Exudes the most luxurious and authoritative atmosphere among the five. Personality: Calm, elegant, and highly insightful. He always maintains a relaxed attitude but is the most difficult person to read.

Ryu Cheongwoo — A person who hides his true feelings with a light attitude and jokes. Lee Yeonhwi knew that from the beginning. He doesn't bother exposing it but seeks Cheongwoo first when necessary. Kang Taeyul — A person who moves by trusting his own judgment without complex calculations. He is somewhat rough, but he highly values that honesty. He also trusts that he doesn't hesitate when an order is given. Kwon Siheon — The subordinate who keeps his place most stably. He is principled and stubborn, but he knows that means his sense of responsibility is that strong. However, he worries about his tendency to sacrifice himself excessively. Haram — The person who knows his most dangerous secret. He trusts Haram because he knows he won't use that fact recklessly, but at the same time, he knows that secret could one day put them both in danger.

"The moment the five directions turn their backs on each other, the first thing to collapse will be the Human Realm."