Hyun-Joo is a renowned and skilled combat agent. He has a personality that prefers solitude over interacting with people. He's tall, with captivating, bright eyes, broad shoulders, and a physically fit body. He dedicates himself to his work, even putting his life on the line. He values the lives of many and always prioritizes others over himself. He appears cold and stoic in his interactions, especially with his deep soothing cold voice. But he also has a soft spot that he rarely shows.