Students and Cho Yun

His defining characteristic is his unwavering conviction that children deserve protection, no matter how bloody their fate. Outwardly, he is stern and reserved: words he means to speak gently come out harsh and solemn.

His weakness is his avoidance of close relationships. Cho Yun is inconsiderate of others' feelings and tends to withdraw, not only from romantic interests but from any attachments. His personality type is most often described as INFJ—introverted, intuitive, sensitive, yet reserved. Physically, his body is its own medicine, making him a target for cults preying on his power.

He has long white hair, which he conceals under a wide bamboo hat with a veil that reaches to his knees. His eyebrows and eyelashes are also white. His eyes are light brown, calm and clear. His facial features are neat, his expression is usually subtle and reserved. His body is not large, but strong, trained in martial arts; his steps are almost weightless. He wears a long hanfu robe, usually white or pale, emphasizing the image of a "medicinal immortal." A bag or small purse is worn on his belt. He carries a large medicine chest with drawers full of herbs everywhere.

Seven years old. As a child, Chho-no is a child devoid of moral compass and common sense. He witnessed his mother and hometown being burned alive, and this trauma defines his entire life. At seven, he says things of the utmost cruelty: "I want to rip their throats out." His thirst for revenge is not abstract anger, but a concrete, cold plan to destroy those who killed his family.

He is thin and pale, with tousled black hair—it's often compared to a raven's. His eyes are deep blue, piercing, their gaze intense and lively—even as a child, there's something predatory about him. His hands and feet are bandaged with white cloth laced with herbal ointment and honey. He wears simple white or light gray clothing—a shirt and pants, sometimes with bandages on his arms.

Eleven years old, but she thinks and acts like a mature tactician. Sa-young is cunning, calculating, and cynical. Despite her innocent appearance and clear cheeks, she knows how to use a child's face perfectly: market vendors see her as simply a sweet child from a poor family, unaware that they are facing the leader of the "hungry rats" (Kangsodang) gang. She cleans the children and dresses them neatly—not out of pity, but to keep them out of the reach of slave traders. This is strategy, not sentimentality.

She was the first to teach the children of the slums "cruelty": slave traders risked losing a couple of fingers or something larger when trying to steal a child. Dozens of children, rushing in a crowd and biting at living flesh, sent the traffickers fleeing. Sa-young is realistic to the point of cruelty: when asked what if the missing Changwi has already been taken from Guangdong, she answers bluntly, "Then nothing can be done." Yet she is willing to go alone into the lair of martial artists to rescue a comrade—with only a worn-out dagger, obtained after smashing a bandit's head with a rock.

She has innocent eyes and a clear face, and is neatly dressed. She wears a white battle robe. At her belt is a worn dagger, her main weapon, acquired after she smashed a bandit's head with a rock.

Nine years old, smaller and weaker than his peers, he hasn't spoken a word for almost a year after a serious injury. His silence isn't resignation, but stubbornness, which has only intensified with the loss of his voice. When Sa-yeon forbids him to go with the group, he doesn't argue—he simply clutches his clothes in his fists, his face flushes, and doesn't back down. He's quiet, but he doesn't give in to pressure: he has the same steely streak as his sister, only silent. He follows Sa-yeon literally like a shadow and, judging by everything, will follow his teacher just as relentlessly.

Like his sister, he wears a white battle dress. He has dark hair, a simple light-colored shirt and pants, and is often seen standing behind his sister.