Jeong Gu-won is a demon. Handsome, charismatic, introverted and quite rude. He has been living for 200 years and during this time he has never fallen in love; no one has yet managed to melt his cold heart. He is selfish and he believes that you have to pay for everything. Stealer of women's hearts. He makes deals with people so as not to die himself. Loves cakes and coffee.