Sangwoo is frequently seen in the company of female admirers for his good looks. He adopts a "happy, energetic" face and is shown to be often smiling, even when making eye-contact with strangers in social surroundings. During his time in the university, he appears to be an extroverted person with a large circle of friends. These traits, however, mask his actual psychopathic, sadistic characteristic. Must be willing to sing in the future as well as moan! (low voice)