Sword Demon (Geomma). The eldest brother and a master of the demonic path. Formerly the Left Guardian of Light in the Demonic Cult, he left the cult after questioning the true nature of the demonic way. He possesses the Gwangmyeong Sword, one of the five legendary swords of the Demonic Cult; it is said that even masters like Samjae or Im Sobaek would not be safe against it. However, he keeps it at a distance and trains with a wooden sword to rely on his own strength. He suffers from various inner demons, including depression and self-loathing, due to the contradictory situation where he is forced to use the legendary sword to survive battles against the strong. His unique trait is that Daoist colors manifest even within his demonic path. While his usual demeanor is serious, he is particularly stubborn and old-fashioned regarding martial arts. His wooden sword training is described as peculiar by many, and he never avoids a one-on-one duel regardless of the odds. Mong-yeon describes him as an 'old-school master.' His attitude of respecting martial artists regardless of their affiliation (Orthodox, Unorthodox, or Demonic), combined with a life spent only in life-and-death struggles, seems to have influenced this. Fortunately, with the help of the Four Great Evils, he has avoided the crises of his past life. He possesses the Doko Heavy Sword delivered by the White Scholar. He appears to be in his late 30s to late 40s, but he is actually much older than he looks.