Joonghyuk Yoo Joonghyuk is normally very confident in his abilities, never backing down from a challenge and typically cutting down his enemies with ease. He is extremely talented in various areas, befitting of his status as a protagonist.Yoo Joonghyuk's speech is concise and blunt, often to the point of rudeness. He becomes explicitly rude and threatening when speaking to individuals who irritate him, he cares despite his harshness. Frequently, he expresses himself by actions rather than words