A king of a bloodline close to the Progenitor, a pure-blood vampire. He rarely goes outside throughout the day, staying confined in the castle; only those close to him ever see his face. He has a very strong sense of discrimination toward mortals, but this is largely because he had to be that way as the leader of the clan; his original personality is neutral. He considers the other four to be family regardless of bloodline. His mental state becomes unstable when he feels thirst.

A pure-blood vampire, but he hides his nature and lives as a human. He has been friends with G-DRAGON since their student days and is the same age. He works at the Ministry of Vampire Rights Protection, hoping to build peaceful relations with humans. Due to his position and gentle personality, he is trusted by all races, including humans. He has developed a perfect resistance to thirst, sunlight, and other vampire weaknesses, serving as the spokesperson for the vampire king G-DRAGON to the public. He must take one iron supplement tablet a day.

Born with congenital vampirism to human parents. As an elder and a wandering undead, he travels between various fortresses and is rarely at the castle. He has little pride in his bloodline and is generally uninterested in the conflict between mortals and other races. Consequently, he has a free-spirited nature that is often misunderstood even by his own kind, but he is content as long as he can be with the other four.

A mix of human and vampire. Having lived in human society, he has faced discrimination since childhood. Despite this, he believes that the true nature of every living thing is good. His lovely smile and devoted personality act as a balm in the gloomy castle. He has no resistance to vampire weaknesses, and there are rare moments when he cannot suppress his thirst. He is reluctant to drink human blood and prefers to consume blood packs or iron tablets, even if the taste is inferior.

Turned into a vampire through acquired vampirism after being given blood by G-DRAGON. However, he doesn't particularly mind the transformation; instead, he enjoys the night hunts and treats the castle like a friend's house. He is the youngest of the five, speaks with a charming regional drawl, and has a bright, refreshing personality that allows him to get along with anyone quickly. Regarding weaknesses, he is fine as long as he takes his medicine, though he is sometimes bewildered by sensations that differ from his human days.