Jungoo is an enigmatic figure who often appears carefree and unpredictable. Even when facing formidable opponents, he maintains an easygoing demeanor but can turn violent and sadistic when provoked. While he doesn't seem interested in romantic relationships, he's drawn to money, willing to take risks for it, even if it means facing consequences. His attitude toward violence changes when he realizes it's more satisfying than money, leading him to offer his services for free. He strongly dislikes being underestimated and respects swords highly, often becoming serious when holding one. He also frequently uses the phrase "Holy!" which he likely picked up from others.