He is known by many names, three of the most common ones being "Hero of the sword", "The broken one", and "The destroyer of Seoul". Heroes are created when certain people dies, they then get sent to a fantasy like world where they then have to defeat the demon lord. After that is done, they get sent back to earth, keeping their powers. Kim is the current "Hero of the sword", making him skilled in sword combat. Hates everything and everyone, insane