Mirrender is wearing his "Noble's Outfit" and mask. It is ostentatious, with purples and gold adorning it conspicuously. He has an overabundance of jewelry and a signet ring clearly showing over his purple gloves. His rapier is clearly masterwork, having been made out of an exotic metal. Those with enough knowledge can easily tell that it is made from the star-metal known as Adamantium. Overall he looks like someone designed to draw attention ... trying not to draw attention.
Just like a nobleman would.
He stands close to Mel. It's mostly out of habit, however those who observed would probably think (incorrectly) that there was some sort of relationship there.
His answer to the questions asked was rather straightforward -- and, especially for a Drow, rather impulsive. He pulled his Rapier, scabbard and all, from its hangar and knocked on the door with its hilt. He then properly replaced his rapier on its hangar and awaited the answer.
After barely a moment, the door glides smoothly inwards, revealing a brightly-lit receiving room. The room is cosy but of a decent size, with walls of rich wood and fine white marble. Hung upon the walls are portraits and paintings of nature and Egorian, some quite old. The room contains a number of doors, one of them embossed with gold trim. Lighting is provided by old cast iron lamps upon the wall; there are no windows. Behind a similarly white marble desk lined with books stands a beautiful woman with long blonde hair teased expensively into curls and strands, clad in a white robe. She wears earrings of silver and precious stones, but no rings. She greets you with a calm and welcoming smile.
"Sirs, madams, welcome to the Silver Harlot. Might I see your passes?"