Melody's attire was more revealing than Hermione's, the Witch wore a tight black dress that slightly rode up with each step she took, with it she wore a matching black lace mask covering half of her face. The point was to keep her identity hidden, she instructed Hermione to do the same. They walked for a few more moments before they reached a staircase that leads above ground. Most members of the club wore masks for protection. When you're in a room full of powerful people it's best to remember that any action can and will be used against you. She wasn't just entering a den of Wizard Kinds most elite, but most dangerous and influential as well.