Hak and Soo-Won were childhood friends in the past and they always worked together to protect Yona. For him, Hak is a cool and dependable person, and this made him become somewhat jealous of Yona because she has a servant like him.[21] Aside from that, he aspired to be as strong as him, and made him one of his goals in life.[22] During their peaceful days, he asked Hak to protect Yona at all costs, knowing that the three of them will separate after he commits his revenge to Emperor Il.