So I was talking to my friends and I decided to made some changes, and hopefully it will enhance the feel of the story. That's why I will change the characters' names, and most will have English names. Some of these names are the real English names of the idol that "play" the character here, but some of the others are made by me. However, I will always put a list of the characters' names and the idols' names at the end of every chapter,

So, the mains are:

Super Junior's Cho Kyuhyun as Marcus, the Crown Prince of the Sapphire Clan. 257 years old, the oldest and the leader of their quartet. Rebellious, insolent, unorthodox, moody, only respected those who earns it. Natural born trouble maker, yet had a strong sense of leadership. Genius and extremely talented, even among Vampires. Not much of the fighter type, but very agile and have perfect aiming.

TVXQ's Shim Changmin as Maximillian, the Crown Prince of the Ruby Clan. 257 years old, two weeks younger than Marcus, making him the second oldest in the group. Calm and a bit cold, yet very close with Marcus. Marcus considered him as his best friend, the one he trusted with his life, and the one that keeps Marcus on track. Despite the fact that he was the first one to became Crown Prince, he dislike being in the spotlight and that's why he let Marcus lead the group, content with helping as his right hand. Excel in both studies and combats, very good with sword, specialized in analizing people and opponents.

CN Blue's Lee Jonghyun as Matthias, the Crown Prince of the Amethyst Clan. 243 years old, last to become the Crown Prince and joined the group, but he's the brain of the group. More of a scholar type, the best strategist. Very composed and appeared to be cunning and calculative, but very loyal to Marcus and Maximillian. A long-range fighter, but very fast and have excellent reflexes.

SHINee's Choi Minho as Mikael, the Crown Prince of the Topaz Clan. 219 years old. THe youngest in the group, but the best fighter. Prefers hand-to-hand combats, but good with any weapons. Hot-headed and emotional, lacking in knowledge compared to the other three. However, he had a very good instincts and intuitions. Adores Maximillian and think of him as his role-model, but more like Marcus in terms of behavior.

So, enjoy :)