Grace Mirchea Luslec

Grace Mirchea Luslec (그레이스 미르치아 루슬렉, Geuraeiseu Mireuchia Luseulaek, Grace Mirchia Luslec ) is Slayer No. 1 and the living "God" of the most dangerous and secretive criminal group, FUG, in The Tower.

Although FUG’s true motives and goals are not clearly known, it is true without a doubt that they exist in the shadows of the Tower, hiding and corrupting. People call Luslec the "God of the Devils" or "Demon King".

Luslec was one of those that helped the Ten climb the Tower. No one knows how or why he has fallen to becoming the leader of a such a dangerous group.

Apparent in his ranking, Luslec is a great warrior. They say that there is nothing his great black Hook can't pierce.

FUG is often compared to the Walhaiksong (Wing Tree) because of their opposition to the 10 Families. However, whereas the Wing Tree is more of a "social club" centered around several members, FUG is a "religious organisation" centered around a single faith. Although the relationship between the two is not that good, there are a few members who are associated with both groups.

The 10 Families forbid anyone within their Families to enter FUG, and they consider it an important duty to eliminate their members, who are known to hide within the shadows of the Middle Area.

But their dangerous status does not mean that they hold influence to contest the 10 Families. As long as the 10 Family Heads hold the contracts with the Tower’s Guardians, FUG’s influence cannot overcome the Family Heads’.

Nevertheless, Luslec holds a rank that surpasses a few of the Family Heads. This is because he represents the ‘Absolute Darkness’ of the Tower.