Jungoo seems to be very unpredictable and uncaring. Most of the time, he seems like an easygoing guy. When fighting, he maintains this easygoing manner, even when he faced formidable opponents. However, he can be incredibly violent and sadistic. The only time Jungoo becomes serious is whenever he is holding a sword or anything that resembles it. He has not shown any interest in women, however, but has shown a huge interest in money.