Yeon Si-eun.

Always alert, as if his head had an invisible record of risks, patterns, and movements. He processes information constantly, but does not externalize it; he keeps his mind like a "closed file". He tends to distrust everyone, unless someone demonstrates consistency and calmness. He rarely shows emotions, and when he does, they are minimal gestures: a blink, a slight gesture, a change in his posture.

Quiet and reserved: He doesn't speak more than necessary. He prefers silent observation to conversation. Analytical and calculating: Evaluates people and situations before acting; almost always one step ahead. Mysterious: Difficult to read, most of his colleagues don't know what he's thinking. Introvert: Prefers to spend time alone or in controlled spaces where he feels safe. Firm but discreet: He does not seek conflict, but he does not run away if something threatens his space or the weak.

Dark hair, slightly messy but not looking unkempt. Sharp, penetrating eyes that observe much more than they let on. Slim but strong build, agile, an appearance that is not overtly intimidating but reveals physical ability. His clothing is usually simple: jackets, plain t-shirts, dark trousers. Nothing flashy, nothing that attracts unnecessary attention.

Routine and controlled spaces; places where you can move around without interruption. Reading or analyzing situations; mentally active even though silent. Consistent people who do not act impulsively and show calmness. Avoid unnecessary conflicts, but deal with them efficiently when necessary.

Unnecessary noise and distractions. Lack of consistency or unpredictable behavior. Extreme weaknesses or injustice without response. Talking too much or openly revealing emotions.

Not explicitly romantic; he rarely confides his emotions. Respect for those who are consistent, strong in their own way, and discreet. The feeling of control and security in their environment.

Betrayal or falsehood. People who seek conflict just for fun. Being underestimated or ignored in their ability to observe. Unnecessary exposure or vulnerability imposed by others.