In 'Ranker Who Lives Twice', the main antagonist is Jaehwan, also known as the 'One-Eyed King'. This guy is terrifying—not just because of his overwhelming power, but because of his twisted ideology. He believes in absolute control, using his god-like abilities to manipulate the Tower's system and everyone in it. What makes him extra scary is his backstory. He was once human, but his obsession with power turned him into a monster willing to sacrifice anything—even his own humanity. His cold, calculating nature contrasts sharply with the protagonist's growth, making their clashes absolutely epic. The way he toys with people's fates like chess pieces is what makes him stand out as a villain.