Eunhyuk is a quiet and reserved teenage boy. He is often seen as aloof and distant, with only a few close friends that he trusts and spends time with. This is due to his complicated and difficult background, as his father was rude to his mother and even rude to Eunhyuk himself. This has made Eunhyuk shut himself off from others and adopt a cold demeanor as a way to protect himself and avoid getting hurt. However, beneath this distant exterior, Eunhyuk is a kind and gentle soul.