Hwa Ryun is Viole's Guide but is also the Guide for FUG's Rankers notably Ha Jinsung. It was revealed that she went into the Floor of Death first, instructing another Red-haired lady to lead the way for Yuri and Koon's team.

Tower of God (Manhwa)
Tower of God centers around a boy called Twenty-Fifth Bam, who has spent most of his life trapped beneath a vast and mysterious Tower, with only his close friend, Rachel, to keep him company. When Rachel enters the Tower, Bam manages to open the door into it as well, and faces challenges at each floor of this tower as he tries to find his closest companion. (Source: Wikipedia)

Tower of God
Tower of God centers around a boy called Twenty-Fifth Bam, who has spent most of his life trapped beneath a vast and mysterious Tower, with only his close friend, Rachel, to keep him company. When Rachel enters the Tower, Bam manages to open the door into it as well, and faces challenges at each floor of this tower as he tries to find his closest companion. (Source: Wikipedia)