Jung Eunae (17 years old)

 - Her name means 'grace with love'

 - A cheerful, bright and is loved by everyone around her

 - Was born in Arizona, United States and was raised in the US until her 17th birthday

 - Her dad is the Chief Police in Gangnam meanwhile her mom married a travelling soldier after a divorce with her father

 "About three things I was absolutely certain. First, he was a vampire. Second, there was part of him, and I didn't know how potent that part might be, that thirsted for my blood. And third, I was unconditionally and irrevocably in love with him."

 Oh Sehun (17 years old)

 - A vampire for the past 100 years

 - Dr. Oh Janghoon found him in the winter of 1919, drenched in blood, almost dead after an accident and saved him by turning him into a vampire 

 - He easily dazzles human females with his beauty, scent and body, and persuades them to do his bidding

 - Brooding and stubborn, but also very kind and compassionate

 "Before her, my life was like a moonless night. very dark, but there were stars, points of light and reason. And then she shot across my sky like a meteor. Suddenly, everything was on fire; there was brilliancy, there was beauty."