Lee Yul is gentle and kind-hearted, always showing compassion and understanding towards others. He is romantic and affectionate, expressing his love for Chae-kyeong in a sincere and tender manner. Intelligent and thoughtful, Lee Yul often thinks deeply about his actions and their consequences. He is conflict-averse, preferring peace and harmony over palace politics and power struggles. Lee Yul is loyal and devoted, unwavering in his support for Chae-kyeong and his mother.