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, or who are powerful unknowns. He is sometimes also rude to his own party members, though he looks out for them nonetheless, showing that he cares despite his harshness. Frequently, he expresses himself through actions or expressions rather than words. These include habits such as dragging the tip of his sword along the ground