Chun-Woo is the conqueror of all nine seats of power, earning him the title of Goomoonryong. He is known to be the strongest martial artist under heaven. He has proven himself able to do battle with the Martial Arts Alliance alone, single-handedly killing and maiming many masters and elites, one after the other.

He is the King of Sindria and the leader of the Alliance of the Seven Seas. He was 14 years old when he first captured a dungeon, the first dungeon ‘Bael’. Since then, he had sailed the seven seas and captured seven dungeons. He is known as the ‘Legendary Dungeon Capturer’ being the master of seven djinn. He is also commonly known as ‘High King of Seven Seas’. His nickname is Sin. His name is based from the ‘Sinbad the Sailor’.