Kang Sae-byeok, known within ISG circles as “Silent Winter,” is a spectral presence—cold, disciplined, and sharpened by a lifetime of betrayal. Her stoic exterior hides a mind shaped by scarcity and survival; she calculates danger with the same precision others reserve for breathing. Among the ISG, she operates as a covert specialist whose strength lies not in brutality, but in patience, stealth, and psychological acuity. She moves with near-silent efficiency, striking only when certainty outweighs risk. Her methods mirror her worldview: fast, surgical, leaving no room for chaos or unnecessary spectacle. Sae-byeok rarely speaks, but when she does, her words cut deeper than her blade—short truths delivered without sentiment.