Secretly, Greatly — Characters & Cast

Protecting his mother in North Korea; later, preserving his newfound neighborhood family.

Evolves from a cold, elite killing machine tolerating a humiliating disguise to a young man yearning for the ordinary life he was forced to mimic.

Defying his corrupt high-ranking father and living an unscripted, spontaneous life.

Hides deep existential sorrow behind a rock-star rocker persona; ultimately chooses a self-sacrificing end on his own terms.

Earning Won Ryu-hwan’s respect and staying beside his captain.

Arrives as an uncompromising young operative taskmaster but reverts into an emotionally dependent child soldier who idolizes Ryu-hwan.

Maintaining absolute ideological purity and the militaristic pride of his unit.

Relentless trainer of Unit 5446 who refuses to allow his creations to be captured or compromised by political treaties; personally hunts them down.

Providing shelter and quiet maternal sustenance to the vulnerable.

Steadfast anchor of the village who recognizes Dong-gu’s wounded soul and adopts him as kin without asking questions.