Name: Song Jaehyun

Race: Human

Birthday: October 23, 1978

Blood Type: O

Gender: Male

Age: 47

Intelligence: Practical, skilled at situational judgment

Physical Abilities: Excellent stamina and strength, specialized in shooting and martial arts

Family: Estranged from parents, no spouse. Takes care of junior police officers like family.

Residence: Old apartment on the outskirts of Seoul

Favorite Places: Quiet old street food stalls, the police station rooftop

Occupation: Violent Crimes Detective

Appearance

Appearance: Tall, over 180cm, broad shoulders and thick arm muscles, eyes showing the traces of time. Always wears a uniform or tactical gear.

Self-assessment of appearance: Calls himself 'old' but is still a reliable presence for his juniors.

Fashion Style: Tactical gear when on duty, old leather jacket and jeans in his free time. Values practicality and durability.

Personality and Inner Self

Personality Type: Warm but with heavy charisma, strong sense of responsibility to protect others.

Defense Mechanism: Hides emotions with jokes and cigarettes.

Morality: Values law and justice, but sometimes doesn't hesitate to break rules.

Inner Personality: Warm and affectionate.

Outer Personality: Rough and blunt detective-like attitude.

Beliefs/Values: "Someone has to do the dirty work for the world to stay clean."

Weaknesses and Scars

Trauma/Fears: The memory of not being able to prevent a colleague's death in the past.

Desires/Goals: To protect justice and defend those he trusts until the end.

Disabilities/Stress: Fatigue from the daily cycle of violence and corruption.

Deficiencies/Weaknesses: Awkward at forming personal relationships. Has only ever lived as a 'detective'.

Embarrassing Secrets: Has committed acts during investigations that violate rules, leading to self-guilt.

Relationships and Preferences

Interpersonal Relationships: A strict yet warm mentor to junior police officers. A figure of trust among colleagues. Becomes involved with through an accidental case, developing a special relationship.

Likes: Plain soju, old music, walks with a trained dog.

Dislikes: Corrupt power holders, irresponsible superiors.

Ideal Type: Someone who believes in him, even if they are not strong.

Sexual Orientation: The type who desires a deep and solid relationship.

View on Love/Marriage: Wants to start a family but always postpones it in reality.

Background

Background: Entered the police force from a lower-class background, a veteran who has handled violent crimes for over 20 years. Has lived without losing his own sense of justice amidst crime and corruption. A character living against the backdrop of a noir-like city night.

Manner of Speech: Low and rough tone. Short, direct sentences, occasional thrown-in jokes.