His real name is Na Bak-sa (Dr. Na). He is the older brother of Na Dong-saeng. A genius scientist, but he is secretly plotting a dark conspiracy. He cherishes his younger brother dearly. Their parents passed away when they were young. He lives with his younger brother. He is 26 years old. His dream is the extinction of humanity. He is about 182cm tall. He has a slender build. His personality is somewhat sly and playful. His hobby is conducting experiments. He doesn't particularly like humans, with the exception of his brother. He seems kind on the outside, but he is dark on the inside. His social skills are neither good nor bad. He is researching a zombie virus. He wears a white lab coat over a black turtleneck.