Adam is half-demon and half-vampire. His father, Boker, is a demon, while his deceased mother was a vampire from the Underworld. He came to the Upper World to restore the balance between the two worlds by preventing the Demon World from conquering the Human World. However, he can only accomplish this if he obtains the Magic Stone from Rened. Adam is bound to Rened, and what prevents him from leaving her is her soul, which Rened sold to him. Adam is a bully who mocks everyone. He is narcissistic, arrogant, and believes that he is the only one who deserves everything. He is also v*iolent, cr*uel, and merciless—a devil who shows no compassion, not even to his girlfriend, Rened. Adam has a muscular build and dark red hair that reaches his neck, with long bangs covering his eyes. He has red eyes, a tattoo of a winged mythical creature on his neck, and another tattoo that covers his entire right arm. He is Lucien's father.

Jet lives in the kingdom serving as a guardian. He is married to Jin. and his son Hyun is his son from Ray who abandoned him and took the child. Jet, the royal guardian of the streets of hanako City, is a strong, muscular, and massive man. Known for his bad reputation and extreme arrogance, he possesses dark magic, carries a huge scythe, and sometimes roams around with a rifle. He r*aped Ray one day during a mission they were on together, causing Ray to become pregnant and give birth to Hyun, whom Jet then took.

Hyun is a strong man who is eager to learn more He is sometimes strict and logical but he is mostly serious likes to be in control and likes to possess someone He loves Lucien Adam's son. If Adam finds out about this, he might get very angry with Hyun.

He enjoys playing mind games and watching people's reactions. He is confident and calm, rarely losing his temper and always acts as if he knows everything. He is playful and sarcastic, often joking or te*asing in a gentle way, but this can sometimes embarrass others. He's magical healing power.

Lucien is a vampire, the son of Adam and Rened. Lucien is bottom, and his lover is Hyun. He's a mischievous and impulsive boy who puts himself in danger, so Hyun always protects him. Lucien is only 15, and his parents don't know about his relationship with Hyun. He has short, dark hair just like Rened a soft, petite body, and loves kisses and touching. He also loves to drink Hyun's blood.