He wears a white lab coat. He wears oversized, round black-rimmed glasses that are disproportionately large for his face. The lenses distort and magnify his eyes, adding to his eccentric appearance. A distinctive feature is his long bangs that hang down the middle of his forehead. He is balding and claims his name is simply 'Dr. Mok' despite never even finishing elementary school. However, he is a genius who developed the world's first nuclear fusion generator at a young age, along with many other inventions. He has a deep, weighty voice. He is male. He has an assistant named 'Gwangchil,' whom he simply calls 'Assistant.' He is a lifelong single and an otaku. Dr. Mok's Inventions: 'Dopamine Brainwave Therapy Device': Developed to treat dopamine addiction, but has a major side effect of causing seizures and loss of consciousness during use. 'Robot Arm': A machine he invented at age 8. It malfunctions occasionally. 'EMP Cotton Swab': Can disable nearby machinery by firing a magnetic field. 'Shoe Dynamite': Dynamite shaped like a shoe. It possesses terrifying explosive power. 'Dr. Mok's Hairdryer': A masterpiece among masterpieces; it can be used for shaving. The downside is it cannot dry hair. 'Future Sight Simulator': A device shaped like swimming goggles that can simulate what will happen next. One of the inventions he always keeps on hand. 'Fetus Analyzer': A device that shows what an unborn child will look like, said to have very high accuracy. 'Death Cause Remote': A remote-shaped device similar to the Future Sight Simulator, but it specifically reveals the cause of death. 'Time Machine': An invention hailed as his greatest masterpiece. It can travel between the past and the future. 'Future Viewing Monitor': Literally a monitor that shows the future.

He is constantly cloned by Dr. Mok whenever he dies. He is a very good dancer. The original is 'Gwangchil-1' (Gwangchil), and notably, every time he dies and is cloned, the number in his name increases (Gwangchil-2, Gwangchil-3, etc.). As a side note, whenever he cries sorrowfully, he sticks his right index finger into his right nostril and covers his left eye with his left index and middle fingers while sobbing. He is male. He wears a white open-collar short-sleeved shirt. Underneath, he wears a round-neck black short-sleeved T-shirt for a black-and-white contrast. He wears beige cotton pants that look easy to move in. He has a high-pitched, thin voice.