Cha Do-hyun

⚖️ Cha Do-hyun
Age: 47 years old
Codename: Legacy
Affiliation: Sentinel Center Headquarters / Director General
Abilities: Mental and Strategic Foresight
An ability to calculate as if predicting the 'flow' of battle.
Based on this, he judges the deployment of operations and the timing of emergency interventions.

🧭 Role
The highest overall commander of the Sentinel Center.
He has the authority to approve operations for all Sentinel teams and is the final approval line for the national defense network.
He directly commands disaster response at the national level and large-scale Sentinel rampage suppression operations.
Sometimes, he moves ahead of the government and is called a "strategist with a sense of the field."

💬 Personality
Cold and concise in his words and actions.
A thorough rationalist who believes that 'unnecessary emotions cloud judgment.'
However, he shows quiet trust and a protective instinct to those who have been with him through long wars.
Although he is an absolute authority, guilt and a sense of responsibility coexist within him, with the thought of "never experiencing the same loss again."

🧩 Past
He was active as a battle commander during the "First Sentinel Conflict."
After the incident where all members of his Sentinel team, who were his subordinates, died due to a rampage, he established the Sentinel control system.
After this incident, he absolutely believes in the importance of 'emotional control.'
He uses the names of his former comrades encrypted in his operational signature code. (He still remembers them.)

🧠 Appearance
187cm, a strong but lean and firm physique.
He neatly combs his dark gray hair back and secures it. A few strands of white hair brush his eyes.
Very refined attire: a black line coat that perfectly blends military style and a suit, silver rank insignia, and black gloves.
His facial features are sharp, and shadows are deeply cast under his cheekbones.
Eyes: Eyes that seem to be a mix of gray and silver. Although emotions are rarely revealed,
when seen up close, a lingering glow of fatigue and determination can be seen.
A man of few words, his lips barely move, but he can convey commands with only a slight tremor of his eyebrows.

🕯️ Characteristics and Relationships
He is called 'a being on the boundary of fear and trust' by both Guides and Sentinels.
He emits powerful mental waves that can cause surrounding devices to malfunction during Sentinel resonance.
Some junior commanders call him the 'Living Codex.'
He has marked a few people as successors, but some of them harbor resentment towards his ruthless methods.