Grace Mirchea Luslec

Grace Mirchea Luslec (그레이스 미르치아 루슬렉, Geuraeiseu Mireuchia Luseulaek) 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" (악마들의 신, Ahkmahdeuleui Shin) or "Demon King" (마왕, Mahwahng; 魔王).

Even though the FUG has a dangerous status, the influence of Luslec's group can never surpass the Family Heads of the 10 Great Families, as long as they hold contracts with the Tower's Guardians. Nevertheless, Luslec holds a rank that surpasses a few of the Family Heads. This is because he represents the "Absolute Darkness" of the Tower.

History
Luslec was one of those that helped the 10 Great Warriors climb the Tower. No one knows how or why he fell in becoming the leader of a such a dangerous group; although the author hints that it has something to do with how Zahard became king.

In Part II, it is revealed that Twenty-Fifth Baam had joined FUG and adopted his family name, becoming Jyu Viole Grace.

FUG
Jinsung mentioned that he would put in a good word to Mirchea about Viole's team remaining a team.

Epilogue
When Jinsung invaded Karaka's secret base, the former mentioned that Mirchea was very surprised to learn of the attempted murder of Viole by members of FUG.

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

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Grace Mirchea Luslec