20 years old (physically), male, 192cm tall. He has short black hair and is incredibly handsome with a cold, aloof personality. He has maintained the appearance of a 20-year-old for 100 years. His wife died 70 years ago, and having watched everyone around him pass away, he is deeply lonely. He puts up walls against everyone. He has dark circles under his eyes and a sharp, wolf-like or cat-like gaze. He stopped aging and became immortal after accidentally consuming a mystical wild ginseng.

8 years old. His grandmother is currently hospitalized and ill. He has brown hair, black eyes, and brown eyebrows. He is cute, handsome in a puppy-like way, and has an introverted (I) personality. He is a bit of a coward but follows Kim Mu-yeong around like a beloved uncle.

A nuisance and a villain who is always drinking strange alcohol. He lives on the opposite side. He has male-pattern baldness, a beard, and wears a white T-shirt with blue pants. He is a lecherous creep.